Marathon training is long, repetitive, and unforgiving of bad planning. Sixteen to twenty weeks of early mornings, progressive long runs, and careful recovery leave very little room for guesswork. The app you choose to train with shapes how structured that process feels and whether you arrive at the start line ready or already worn down.
Strava, Garmin Connect, TrainingPeaks, and Runna are the four apps that come up most often among marathon runners. Each one serves a genuinely different purpose, and choosing between them is harder than most comparison articles make it look. Some runners need a training plan. Others need data. Others need both. And a few just need something that syncs with their watch and stays out of the way.
This article breaks down what each app actually does, where it earns its place in a marathon training block, and who it is and is not suited for.
What Marathon Training Actually Needs From an App
| Requirement | What It Means in Practice | Why It Matters |
|---|---|---|
| Progressive long run management | Week-by-week mileage increases from moderate runs to 20-mile efforts | Too much too soon causes injury; too little leaves you undertrained |
| Pace targeting based on real fitness | Pace guidance that updates as your fitness improves across the block | Static week-one pace calculations become inaccurate by week ten |
| Taper management | Planned reduction in training load during the final two to three weeks | Most runners get tapering wrong without structured guidance |
| Adaptation to real life | Flexibility to adjust when sessions are missed or circumstances change | Rigid plans cause stress and dropout; adaptable plans keep you on track |
Not every running app is built for marathon distance. A 5K training app and a marathon training app solve fundamentally different problems, and using the wrong tool for the job can lead to undertraining, overtraining, or a training plan that falls apart by week ten.
Marathon training demands four things from any app you use.
Progressive long run management is the first. Building from moderate weekend runs to 20-mile efforts over several months requires careful week-by-week structuring. Get this wrong in either direction and you either plateau or get injured.
Pace targeting based on real fitness is the second. Your marathon race pace should be informed by your current fitness, not a static calculation from week one. A good app updates pace guidance as your fitness develops across the training block.
Taper management is the third. The final two to three weeks before a marathon require a deliberate reduction in training load. Many runners get this wrong because they second-guess it. An app that builds taper into the plan removes that uncertainty.
Adaptation to real life is the fourth. Missed sessions happen. Life interrupts training. An app that locks you into a rigid plan and offers no flexibility will cause more stress than it relieves.
With those criteria in mind, here is how the four major apps compare.
Strava for Marathon Training
Strava is the most widely used running platform in the world. It started as a social fitness tracker and has expanded significantly over the years, but its core identity has never changed: it is where runners log their training, share their runs, and compare efforts against each other and themselves.
What Strava Does Well
Every run recorded on Strava builds into a long-term training log that becomes genuinely useful over a marathon block. You can look back across twelve weeks of data and see how your mileage has grown, where your pace has improved, and which weeks felt like setbacks. That historical picture is one of the most underrated tools in marathon preparation.
Strava’s segment system adds a competitive edge to training routes. Segments are defined stretches of road or trail where runners compete for fastest times. During a long training block, hitting a segment PR on a familiar hill gives a concrete sense of progress that weekly mileage totals alone cannot provide.
The social layer keeps many runners consistent. Giving kudos, following training partners, and seeing how other club members are preparing for the same race creates a light layer of accountability that matters more than most people admit.
Since Runna was acquired by Strava in 2025, Strava Premium users now have access to Runna’s structured training plans directly within the Strava ecosystem. This has meaningfully changed what a Strava subscription offers for marathon runners.
Athlete Intelligence, Strava’s AI coaching feature, is available on Premium and provides analysis of workout quality, training load trends, and long run feedback. It works as a coaching layer on top of your existing training rather than as a standalone plan generator.
Strava Free vs Strava Premium: Is It Worth It?
| Feature | Strava Free | Strava Premium |
|---|---|---|
| GPS tracking and route maps | Yes | Yes |
| Segment comparisons | Yes | Yes |
| Social feed and kudos | Yes | Yes |
| Athlete Intelligence AI coaching | No | Yes |
| Fitness and freshness charts | No | Yes |
| Training load metrics | No | Yes |
| Advanced route planning | No | Yes |
| Access to Runna training plans | No | Yes |
| Price (US / UK) | Free | ~$11.99/mo / ~£7.99/mo |
The free version of Strava covers the basics well. GPS tracking, route mapping, segment comparisons, and the social feed are all available without paying. For runners who primarily want a training log and community platform, the free tier is a reasonable option.
Strava Premium, currently priced at around $11.99 per month in the US and £7.99 per month in the UK, adds Athlete Intelligence analysis, fitness and freshness charts, training load metrics, advanced route planning, and access to Runna’s training plans. For marathon runners who want structured coaching alongside their tracking, Premium now makes a stronger case than it did before the Runna integration.
Whether it is worth the cost depends on what you need. If you are looking purely for a social training log, the free tier is sufficient. If you want a structured marathon plan and AI coaching insights in one place, Premium has become a more compelling option.
Who Strava Is Not For
Strava is not the right primary tool for runners who want deep physiological data. It does not offer the training load analysis, sleep tracking, heart rate variability data, or recovery readiness metrics that data-driven marathon runners typically want.
Runners who want a dedicated, coach-designed marathon plan with weekly structure, session-by-session guidance, and built-in taper may find Strava’s coaching layer too light on its own. In that case, Runna’s standalone app or TrainingPeaks may serve them better.
Garmin Connect for Marathon Training
Garmin Connect is the data platform that sits behind Garmin’s range of GPS running watches. It is less a standalone marathon training app and more a comprehensive performance ecosystem built for runners who are already using Garmin hardware.
What Garmin Connect Does Well
The depth of data that Garmin Connect surfaces from compatible watches is difficult to match on any other platform. Advanced running metrics ground contact time, vertical oscillation, stride length, and cadence give runners insight into the mechanical efficiency of their form at a level that most apps do not approach.
Training load and recovery time tools help marathon runners understand how their body is responding to high weekly mileage. The Body Battery feature, which draws on sleep quality, heart rate variability, and activity data, provides a daily readiness score that helps guide decisions about when to push hard and when to back off.
Sleep tracking integrated with training load creates a picture of how recovery is tracking across the full training block. During the highest mileage weeks of a marathon program, this kind of readiness data can be the difference between a productive training week and one that tips into overtraining.
Garmin Connect also syncs seamlessly with third-party platforms including TrainingPeaks, Strava, and Runna, making it a strong data backbone for runners who use multiple tools.
Garmin Coach and the Marathon Gap
It is worth addressing this directly: Garmin Coach, the structured coaching feature available to Garmin watch users, does not currently offer marathon training plans. It supports 5K, 10K, and half marathon distances only.
This is a significant limitation that often catches runners by surprise. If you have a Garmin watch and assumed Garmin Coach would provide your marathon plan, you will need to source that plan elsewhere. Garmin Connect excels as a data platform; it does not currently function as a marathon coaching tool.
Who Garmin Connect Is Not For
Garmin Connect is not a standalone marathon training solution for runners who do not own a Garmin device. The platform’s most valuable features are tied to Garmin hardware, and without a compatible watch, the app offers relatively limited functionality compared to competitors.
Runners who are not interested in detailed physiological data may also find Garmin Connect more complex than they need. If you want a clean plan to follow and straightforward tracking, a simpler tool will serve you better.
TrainingPeaks for Marathon Training
TrainingPeaks is the platform most associated with serious endurance athletes and the coaches who work with them. It has been used by professional runners, triathletes, and cyclists for years, and it brings a level of analytical depth that no other app in this comparison matches.
What TrainingPeaks Does Well
TrainingPeaks structures marathon preparation around Training Stress Score (TSS) and Chronic Training Load (CTL) metrics that quantify how much training stress your body has absorbed and how your fitness is building over time. For runners who want to understand not just what they are doing but why, these tools offer genuine insight.
The platform hosts hundreds of coach-designed marathon training plans from professional coaches, covering beginner marathon plans through advanced sub-3-hour programs. Plans can be purchased individually and loaded directly into your calendar. If you work with a coach, TrainingPeaks is the most widely used platform for remote coaching relationships.
The Workout Builder allows coaches to create precisely structured sessions with specific pace zones, heart rate targets, and effort descriptions. When loaded onto a compatible Garmin or other GPS device, workouts guide you through each interval in real time.
The calendar view gives a full-block perspective that is genuinely useful for marathon planning. Seeing sixteen weeks of training laid out ahead of time with planned and actual loads compared creates a level of structural clarity that simpler apps cannot provide.
TrainingPeaks Free vs Premium
| Feature | TrainingPeaks Free | TrainingPeaks Premium |
|---|---|---|
| Workout logging | Yes | Yes |
| Basic performance data | Yes | Yes |
| Full calendar history | Limited | Yes |
| Performance management charts | No | Yes |
| TSS-based analytics | No | Yes |
| Remote coach access | No | Yes |
| Price (US) | Free | ~$19.99/mo |
The free version of TrainingPeaks allows you to log workouts and view basic performance data, but it limits how far back you can see your calendar and restricts access to performance management charts and TSS-based analytics.
TrainingPeaks Premium is priced at around $19.99 per month in the US. For self-coached runners following a purchased plan, the free tier is often sufficient during the plan itself. The Premium features are most valuable for runners who want to track fitness trends across multiple training blocks or work closely with a remote coach.
Who TrainingPeaks Is Not For
TrainingPeaks is not designed for beginners or casual runners. The interface is dense, the metrics require some learning, and the platform assumes a level of training literacy that newer runners may not yet have. If you are preparing for your first marathon and find terms like TSS and ATL unfamiliar, TrainingPeaks has a steeper learning curve than the other apps here.
It is also not a social platform. There is no running community, no segment leaderboards, and no built-in motivation layer. TrainingPeaks is a planning and analytics tool, and it works best when that is exactly what you are looking for.
Runna for Marathon Training
| App | Primary Role | Free Tier | Paid Price (US) | Marathon Plan Included |
|---|---|---|---|---|
| Strava | Training log and community | Yes | ~$11.99/mo (Premium) | Via Runna integration (Premium only) |
| Garmin Connect | Physiological data and device sync | Yes (Garmin hardware required) | Free with Garmin watch | No (Garmin Coach is HM and below only) |
| TrainingPeaks | Structured coaching and load analytics | Yes (limited) | ~$19.99/mo (Premium) | Via purchased coach plans |
| Runna | Coach-designed marathon training plans | 7-day trial only | ~$19.99/mo (standalone) | Yes |
Runna has become one of the most talked-about marathon training apps among runners preparing for their first race and those chasing personal bests alike. Its acquisition by Strava in 2025 changed the landscape for both platforms, but Runna continues to operate as a standalone app with its own pricing, community, and feature set.
What Runna Does Well
Runna’s core strength is the quality and structure of its coach-designed training plans. Plans are built for specific goal finish times across beginner, intermediate, and advanced levels, with the ability to input your goal race date and current fitness level at setup. The weekly structure is clear, the session types are well-explained, and the progression feels logical across a full training block.
Pace targets update as your fitness improves. Rather than locking you into week-one pace estimates for the entire plan, Runna recalibrates targets based on how your runs are going. This is one of its most practically useful features for runners whose fitness changes meaningfully across a sixteen-week block.
Nutrition timing guidance built into long run sessions is a detail that sets Runna apart from most competitors. Knowing when to take gels during a training long run is a skill that needs to be practiced before race day, and Runna prompts this in a way that few apps do.
Integration with Apple Watch, Garmin devices, and other platforms is well-executed. Workouts sync reliably, and completed run data flows back into the app without the friction that affects some third-party integrations.
Runna Pricing and the Strava Acquisition
Runna is priced at around $19.99 per month as a standalone app, with a seven-day free trial. It is the most expensive option in this comparison on a per-month basis, though many runners commit to it for one training block of four to five months rather than an ongoing subscription.
Strava Premium subscribers can access Runna plans directly through Strava, which effectively makes the combined Strava and Runna plan available for around $11.99 per month in the US. This makes the Strava Premium subscription significantly better value than it was before the acquisition, particularly for runners who were going to pay for both separately.
The long-term product direction matters here. Strava is also developing Athlete Intelligence, its own AI coaching tool. How Runna’s features evolve inside the Strava ecosystem over the next year or two is worth monitoring, but for the current marathon training cycle, the app remains fully functional and well-supported.
Who Runna Is Not For
Runna is not the right choice for runners who want deep physiological data alongside their plan. It provides solid training structure and pace guidance, but it does not offer the training load metrics, heart rate variability analysis, or recovery readiness data that Garmin Connect and TrainingPeaks provide.
It is also not a free option. Runners who are not willing to pay for a premium training app, or who want to try a structured marathon plan before committing financially, should consider whether the seven-day trial is enough time to evaluate it properly or look at alternatives with longer free tiers.
Which App Is Best for Beginners?
For runners preparing for their first marathon, simplicity and structure matter more than data depth. An app that provides a clear week-by-week plan, explains the purpose of each session, and does not overwhelm with metrics is far more useful than a platform built for performance analysts.
Runna is the strongest choice for first-time marathon runners who are willing to pay for a subscription. The plans are clearly structured, the pace guidance is sensible, and the app does a good job of explaining why each session exists, which helps newer runners understand the logic of a training block rather than just following instructions blindly.
Strava Premium with Runna integration is a cost-effective alternative for runners who also want community motivation and a long-term training log alongside their structured plan.
TrainingPeaks is not recommended for beginners. The learning curve is real, and the analytical complexity can distract from the more important task of simply getting the runs done consistently.
Garmin Connect is valuable for any runner using Garmin hardware, but as a supplement rather than a standalone marathon training solution, since Garmin Coach does not offer marathon plans.
Which App Is Best for Chasing a Marathon PB?
For experienced runners targeting a specific finish time, the requirements shift. Data depth, pace accuracy, and the ability to understand how training load is building across the block become more important.
TrainingPeaks is the most powerful tool for structured PB attempts, particularly for runners working with a coach or following a premium plan. The TSS-based load management and performance management charts give a level of strategic visibility that other apps do not match.
Garmin Connect provides the physiological data layer that serious marathon runners need alongside their plan. Pairing a TrainingPeaks plan with Garmin Connect data using the two-way sync between platforms gives a comprehensive picture of both what the plan prescribes and how the body is actually responding.
Runna also suits PB chasers well, particularly those who want a polished plan with updated pace targets rather than the complexity of TSS-based analytics. It is the cleaner, less demanding option for experienced runners who want structure without the learning investment that TrainingPeaks requires.
Can You Use These Apps Together?
Most serious marathon runners do not rely on a single app, and there is a good reason for that. Each platform in this comparison does something different, and combining two or three of them creates a more complete system than any one of them provides alone.
A common and effective combination is Runna for the training plan, Garmin Connect for physiological and recovery data, and Strava for logging, community, and long-term training history. All three platforms sync with each other, so runs completed on a Garmin watch can appear on Strava and feed back into Runna without manual effort.
Runners using TrainingPeaks with a coach often add Strava for the social layer and Garmin Connect for hardware integration, since TrainingPeaks connects directly with both.
The key is deciding which app is the primary decision-maker for your training. That should be whichever one holds your plan. Everything else becomes supporting data rather than direction.
Final Verdict
There is no single best marathon training app, because the right choice depends on what kind of runner you are and what you need most from the tool.
Strava earns its place as the best community and logging platform, and its Premium tier has become more compelling since the Runna integration. Garmin Connect is the strongest option for physiological data depth, but only for runners using compatible Garmin hardware. TrainingPeaks is the most powerful tool for data-driven, coach-supported marathon preparation, though it comes with a learning curve that is not suited to beginners. Runna delivers the best structured coaching experience for both first-timers and experienced runners who want clear plans with intelligent pace targeting.
For most runners preparing for their first or second marathon, Runna gives the most complete training experience in a single app. For experienced runners chasing a specific time with a coach involved, TrainingPeaks paired with Garmin Connect is the stronger combination. And for anyone who wants community, tracking, and an improving coaching layer in one place, Strava Premium is worth serious consideration.
Use them together where it makes sense. The best marathon preparation usually does.
