# Marafit: Marathon Training — Built from your own run data > Built from your own run data (iPhone/iPad app by 洋 刘.) - Source: https://appshunter.io/ios/app/marafit-marathon-training/id6802884354 (this page in markdown: same URL + `.md`) - Developer: [洋 刘](https://appshunter.io/developer/6802149620) - Category: Health & Fitness - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 7 MB - Languages: American English, Chinese (Simplified, China) - Released: 2026-08-28 - Data updated: 2026-09-26 - User reviews in markdown: https://appshunter.io/ios/app/marafit-marathon-training/id6802884354/reviews.md ## What is Marafit? Marafit turns your own Apple Health running data into a full 16-week marathon plan — and keeps adjusting it to what you actually run. Most training apps hand you a template and ask you to fit into it. Marafit reads your last 90 days of runs, works out your heart-rate zones, your easy pace, your threshold pace and your current fitness, and builds the plan around those. WHAT YOU GET FOR FREE • A complete 16-week periodised plan — 3:1 build/down weeks, a 3-week taper, every session placed on a real date • Pick your own training days: long run day, quality day, and as many support runs as you want (3 to 6 sessions a week) • Personal heart-rate zones for every session, derived from your maximum and resting heart rate via the Karvonen method • Daily readiness score from HRV, resting heart rate and sleep, with the full breakdown of how it was calculated • Today's fitness, fatigue and form (CTL / ATL / TSB) • Weekly score: planned versus actual, session by session • Long-run comparison: heart-rate curve and time in each zone • A realism check on your goal time, so you find out before week one rather than on race day MARAFIT PRO • Paces tuned to you — easy and threshold paces come from your own measured efforts and VDOT, instead of being derived from your goal time • A plan that follows you — miss a week or overshoot one, and the remaining weeks are re-anchored to what you actually ran • Fitness and fatigue trends over 90 days, not just today's numbers • Deep run analysis — aerobic efficiency, heart-rate drift with warm-up removed, heat stress from the temperature and humidity recorded during the run, plus running dynamics and elevation HOW IT WORKS Marafit reads runs, heart rate, HRV, resting heart rate, VO2 max, sleep and body metrics from Apple Health. It never writes anything back. Every calculation runs on your iPhone. The training model follows established methods: Karvonen heart-rate reserve for zones, Daniels VDOT for equivalent performances and threshold pace, Banister TRIMP for training load, and the CTL / ATL / TSB fitness-fatigue model. BEFORE YOU START Marafit needs running history in Apple Health to build anything — record runs with Apple Watch or the iPhone Workout app. If you have none yet, tap "Or explore with demo data" on the first screen to load 13 weeks of sample runs and see the whole app, then clear them in one tap. Currently supports the full marathon (42.195 km). Half marathon is not included: the periodisation, long-run progression and race-pace work are all calibrated for the full distance, and offering a rescaled version would produce a plan that looks usable but isn't. iPhone only. There is no iCloud sync, so your data stays on the device you use. PRIVACY No account. No servers. No analytics, advertising or tracking SDKs. Your health data never leaves your device — we have no way to receive it even if we wanted to. Deleting the app deletes everything. SUBSCRIPTION Marafit Pro is available as a monthly or yearly auto-renewing subscription, or a one-time lifetime unlock. Eligible Apple IDs get a 7-day free trial on the yearly plan. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel any time in your App Store account settings. The lifetime option does not renew. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://jakepyth.github.io/marafit-support/privacy.html Marafit gives training guidance, not medical advice. It does not diagnose or treat any condition. Consult a physician before starting a new training programme, and stop if you feel unwell. ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Marafit: Marathon Training | $19.99 | per year | | Marafit: Marathon Training | $2.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Marafit: Marathon Training | $39.99 | one-time | ## Version history (last 3 releases) ### 1.2 — 2026-09-23 · Compare heart-rate distribution (Pro) is now three views — Distribution, HR trend and Efficiency — each with its own one-line takeaway and how-to-read note. · New: how far each long run sat from your marathon-pace zone, drawn as a bar from the edge of that zone. A bar pointing up means that run reached race effort. · The box plot no longer draws the warm-up, so the vertical scale tightens and the steady part of each run is easier to read. The share of the run below the whisker is still reported in the details. · Landscape: the chart fills the screen, and tapping a run opens its details on the right. · The long-run list has a new "Latest long run" card you can tap through. · The heart-rate curve for a single session now has a zone legend, and the target heart-rate range is labelled in bpm. Fixed: the average heart rate behind Aerobic efficiency didn't match the value shown next to it; the bottom tab bar could disappear after rotating back to portrait; some text-only cards were slightly narrow. ### 1.1 — 2026-09-03 HALF MARATHON Marafit now builds half marathon plans as well: 12 weeks, calibrated separately from the marathon rather than rescaled from it. READINESS NO LONGER MAKES NUMBERS UP Readiness is built from sleep, HRV and resting heart rate. Previously, when any of those were missing, the app filled in assumed values and still showed a score — so a phone with no health data at all would report "86 · Excellent". That number was measuring nothing. AFTER THE RACE Marafit no longer stops at the finish line. There is now a post-race recovery block: 3 weeks after a marathon, 2 after a half. Find it under the Plan tab; it's free. THE PLAN NOW COUNTS BACK FROM RACE DAY Your race date used to be stored and displayed, but it never affected the schedule: the plan always started from the current week, so it could finish weeks before your race — or run past it, which meant the taper landed after the race and you went to the start line at full volume. Now the plan is anchored to race day: its last week is race week. If there isn't time for the whole plan, you get the back end of it, taper intact, and the form tells you which week you're starting from before you generate. No race yet? Set Date to "None" and tell us which week you're on instead. That gives you a training block with no race attached; you can set one later. TODAY KNOWS WHAT DAY IT IS The Today tab used to say "Rest day" for six different situations, including on your race day and every single day after your race. It now distinguishes: no plan yet, plan not started, rest day, race day, plan finished early, cycle complete, and training block complete — with a way forward from each. ARE YOUR LONG RUNS WORKING? (PRO) The LSD tab now puts every long run of the last six months on one timeline, as two charts sharing an x-axis. On top, a box plot of each run's heart-rate distribution with your marathon-pace heart rate marked across it: if the middle half of a run sits up against marathon effort, that run was raced rather than run. Underneath, your aerobic efficiency — how far you travel per heartbeat — run by run, and once you have six of them, your recent runs compared against your earlier ones. FIXED • Adaptive re-planning no longer pushes your remaining weeks into the future. If your plan had been running for a few weeks, re-planning moved every remaining week back by exactly that many weeks and left the current week empty — so the app showed "Rest day" for weeks on end. • Recovery runs no longer lose points for being easy. Their pace band was the same as an easy run's while their heart-rate target was lower, so running at the prescribed heart rate meant falling outside the pace band — and the score docked you for it. Heart rate is now the target and pace is only a ceiling, shown as "6:15 or slower" rather than a range. Past recovery runs will score higher than they did. • Goal times entered with seconds (H:MM:SS) were silently ignored when computing target paces, which put every pace band in the plan out by a wide margin. • The Plan form now previews your first week before you generate, so an unrealistically low starting volume is visible up front. ### 1.0 — 2026-08-27 No release notes. ## Apps similar to Marafit | App | Rating | Price | Category | | --- | --- | --- | --- | | [Stride Pro - AI Run Coach](https://appshunter.io/ios/app/stride-pro-ai-run-coach/id6788269243) | — | Free | Health & Fitness | | [ohmybody-Readiness & Fitness](https://appshunter.io/ios/app/ohmybody-readiness-and-fitness/id6776044082) | 5.0 (1) | Free | Health & Fitness | | [TreeletFit - Walk,Run,Cycling](https://appshunter.io/ios/app/treeletfit-walkruncycling/id6745997925) | 5.0 (1) | Free | Health & Fitness | | [LoadFit - Fitness Companion](https://appshunter.io/ios/app/loadfit-fitness-companion/id6739810752) | 4.0 (2) | Free | Health & Fitness | | [搭友搭](https://appshunter.io/ios/app/id6790809597) | — | Free | Health & Fitness | | [HealthLight](https://appshunter.io/ios/app/healthlight/id6760902053) | 5.0 (1) | Free | Health & Fitness | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-26.*