Accomplice vs Darwin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Accomplice
This marathon training system offers daily guidance from an Olympic athlete, personalized training plans, and mental tools for consistency. It replaces guesswork with a clear loop of learning, training, and reflection to help runners improve.
- Daily expert guidance
- Personalized training plans
- Structured workouts
- Mindset and journaling tools
- Adaptive training
- Inspirational docuseries
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Become the fastest marathoner you've ever been. Accomplice is the complete marathon training system built with Olympian Clayton Young for serious runners pursuing meaningful PRs. Most marathoners train alone. They piece together advice from YouTube, podcasts, and friends. They wonder if they're doing the right workouts, struggle to stay motivated through the build, and don't have access to expert guidance when questions come up. Accomplice solves that. Train With a Proven System Get a personalized marathon training plan built around your pace, goals, experience, and race date. Every workout is designed using the same principles Clayton Young used to become one of the fastest marathoners in the world. Learn What Actually Works The Run Faster Marathons course teaches the principles behind effective marathon training so you understand not just what to do, but why you're doing it. Train With Others Join seasonal marathon training groups filled with runners pursuing similar goals. Stay accountable, learn from others, and build alongside people who understand the process. Get Guidance From Clayton Young Attend coaching calls, ask questions, and learn directly from Olympian Clayton Young without paying for private coaching. Stay Consistent Use journaling, reflection, and mindset tools designed to help you stay focused through the ups and downs of marathon training. Accomplice includes: Personalized marathon training plans The Run Faster Marathons course Seasonal marathon training groups Coaching calls with Clayton Young Garmin workout watch sync Journaling and mindset tools Ad-free access to Clayton's docuseries Built for serious marathon runners pursuing PRs. Start your free trial today. Terms of Use(EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Darwin
This app creates personalized weekly training plans for endurance athletes, adapting to your actual performance, sleep, and well-being. It rebuilds your schedule each week, offering clear explanations for adjustments and incorporating race-specific training and fueling targets.
- Weekly plan rebuilding
- Adaptive volume and intensity
- Race-specific session shaping
- Carbohydrate fueling targets
- Readiness tracking from health data
- Plain-language explanations
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Every training plan you have downloaded assumed a perfect week. Darwin does not. You have three sports, a job, and a race on the calendar. Then you get sick, or a meeting eats Wednesday, or you sleep five hours three nights running. A PDF plan cannot see any of that. It just keeps counting down, and you fall behind a schedule that was never built for the week you actually had. Darwin rebuilds your plan every week around what actually happened. HOW IT WORKS Tell Darwin your race, your date, and the days you can train. It builds a full week-by-week plan to race day. At the end of each week it asks what you completed, how you slept, how you felt, and whether you fueled your long sessions. Then it rebuilds the weeks ahead. Nail the week and it progresses you. Miss sessions or sleep badly and it pulls volume back and drops intensity, rather than pretending the week went fine. Every change comes with a plain-language explanation of what moved and why. A DETERMINISTIC ENGINE, NOT A CHATBOT This is worth being precise about. Darwin never asks a language model how hard you should train. Every load decision comes from a deterministic engine with hard limits written into it: Volume never ramps more than 10 percent week over week Every fourth week is a recovery week at 65 percent load A bad week can cut your load, but never below 60 percent of what was planned A real taper into race day, sized to your event Language models do exactly one job here: turn the engine's decisions into a paragraph you can read. They never make them. BUILT FOR YOUR RACE Ironman, 70.3, Olympic, sprint, marathon, half marathon. Darwin also shapes sessions around the course you are actually racing: climbing work for a hilly bike leg, heat-adapted sessions for a hot race, open-water skills if you are not racing in a pool. FUELING ON THE SESSIONS THAT NEED IT Every long session carries a carbohydrate target in grams per hour. Every day is tagged low, medium or high carb based on the training load you are actually doing that day. No second app for nutrition. READINESS FROM REAL DATA With your permission, Darwin reads sleep, resting heart rate, heart rate variability and completed workouts from Apple Health, and factors them into the weekly rebuild. Your health data stays on your phone. WHY I BUILT IT I am a dad and a lawyer, and Eagleman 70.3 was my first one. I went in less fit than I wanted to be and, worse, with my nutrition guessed rather than planned. My stomach turned on me early and the half marathon became a walk between portable toilets. I promised myself never again. Every app I tried wanted me to build my life around a training schedule, and none of them took fueling seriously. So I built the one that does both. Six weeks after I started, I raced a second 70.3 in Maine and took nearly 40 minutes off my time. WHAT YOU GET A full plan to race day, rebuilt every week Carb targets on every long session Readiness from your sleep, HRV and resting heart rate Plain-language answers on why the plan changed Notes on any day, which the next rebuild takes into account Over 60 races to browse and search Your plan synced to your account, so a lost phone does not cost you your training Darwin is free for 7 days. After that it is a subscription, and you can cancel any time in your Apple ID settings. SUBSCRIPTION DETAILS Darwin Pro is 9.99 USD per month or 79.99 USD per year, after a 7-day free trial. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID account settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms: https://darwinendurance.com/terms Privacy: https://darwinendurance.com/privacy
Screenshots
Verdict
The clearest difference is update cadence: Darwin at every 3 days against Accomplice's every 3 weeks. Accomplice's advantage is ratings volume (14 vs 3). On price, rating, review sentiment and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Accomplice sells 2 in-app purchases, starting at $349.00 per year and Darwin sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Accomplice against 5.0 for Darwin. Both are backed by a comparable volume of ratings — 14 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Accomplice ships an update every 3 weeks, Darwin every 3 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Accomplice | Darwin |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (14 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 14 — better | 3 |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 126 MB | 56 MB |
| Age rating | 12+ | 4+ |
| Developer | Accomplice LLC | Darwin Endurance LLC |
Customer experience
Accomplice
Darwin
In-app purchases
Accomplice
- Pro access7 Days trial$349.001 Year
- Summer Training Group$299.00
Darwin
- Darwin7 Days trial$9.991 Month
- Darwin7 Days trial$79.991 Year









