Darwin vs TrainGO.ai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
TrainGO.ai
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TrainGO turns every ride, run and swim into a plan that adapts to you: FTP-based zones, training load, power curve and an intelligence that adjusts your week to your body — not the other way around. HOW IT WORKS Create your account, connect your device and get your first adaptive plan. TrainGO estimates your FTP on day one from your level and recalibrates it automatically as you train. HUMAN COACH + INTELLIGENCE Choose your coach among trainers with real podium history. Coach DNA captures your trainer's methodology and applies it to every week, with them close by and available 24 hours. Missed a workout? The week rebuilds itself automatically within the coach's methodology. YOUR WORKOUT ON YOUR DEVICE Import FIT, TCX and GPX activities and use the integrations available in the app. Connection availability and features depend on your device and authorization from the respective service. EVOLUTION CHARTS Overview, power curve with 5s-60min peaks, training load (PMC), durability, benchmark, power and HR zones, running and recovery. The same professional suite for athlete and coach. RACES AND GOALS From registration to the finish line: full preparation protocol, taper, equipment checklist and race mindset so you peak on the right day. PLANS Treino (free): calendar, manual logging, FIT/TCX/GPX import, zones, connected devices, block-based workout builder and community. Coach: automatic week by the House Coach, races, mindset, trophies, Performance Coach and Athlete DNA. Coach+: everything in Coach, human coach marketplace, voice and intelligence workout creation, data-aware chat. Competidor: everything in Coach+, advanced charts, smart workout analysis, week readaptation, power curve, PMC, race management with taper, mindset audios, bulk history import and priority support. Subscriptions are optional, monthly or yearly, and renew automatically. Eligible new subscribers may receive a 7-day free trial. After the trial, you are charged the price and billing period confirmed in the App Store unless you cancel. Manage or cancel renewal in your Apple account subscription settings before the next charge. Local prices and applicable terms are displayed before confirming your purchase. PRIVACY AND SECURITY Your health data is used exclusively to show your calendar, training load and readiness. Connected device data is never shared with third parties without your explicit consent. Terms: https://traingo.ai/terms Privacy: https://traingo.ai/privacy
Screenshots
Verdict
The clearest difference is device support: TrainGO.ai at 3 against Darwin's 1. On price, ads, in-app purchases and iOS requirement 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. Darwin sells 2 in-app purchases, starting at $9.99 per month and TrainGO.ai sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Darwin | TrainGO.ai |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 55 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Darwin Endurance LLC | RUMPLETISTEKIN CRIACOES LTDA |
In-app purchases
Darwin
- Darwin7 Days trial$9.991 Month
- Darwin7 Days trial$79.991 Year
TrainGO.ai
- Coach Monthly7 Days trial$4.991 Month
- Coach+ Monthly7 Days trial$7.991 Month
- Competidor Monthly7 Days trial$11.991 Month
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- Coach Yearly7 Days trial$22.991 Year
- Coach+ Yearly7 Days trial$39.991 Year
- Competidor Yearly7 Days trial$59.991 Year








