Frequently asked questions

TextFit is an AI endurance coach for iPhone and Android. It builds a week-by-week training plan for running, cycling, swimming and strength around your goal and the time you have, puts every workout on your Garmin or Apple Watch with targets in your own paces, watts and heart rates, and changes the plan when you tell it what changed in the coach chat.

How the coach builds a week

Install TextFit on your iPhone or Android phone and answer the onboarding questions: sports, goal, sessions per week, day off, the time you have, your current fitness and strength. Agree to the AI consent, connect Garmin or Apple Health (or Health Connect on Android), and the coach builds your first two weeks. You see the next 7 days, start your 14-day free trial, and the plan is on your calendar and your watch.

Yes, on Google Play. Garmin and Wahoo get your workouts as on iPhone, and Health Connect brings in completed workouts, sleep and recovery from your watch’s app. There is no web app.

The coach replies in the language you write to it in, so you can describe your training and ask questions in your own language. The app’s screens are in English.

No email or password is needed. The app creates an anonymous account on your phone the first time you open it.

Earlier versions of TextFit turned a workout you typed into a structured workout and sent it to intervals.icu or Apple Watch. TextFit is now a coach that plans the whole week. Workouts you created in the earlier version still appear, read-only, on their dates.

The first 14 days are free. After that TextFit costs $14.99 a month or $99.99 a year (US prices; the App Store or Google Play shows the price in your currency). Both plans include the free trial.

You start it after the coach has built your first two weeks and shown you the next 7 days, so you see your plan before you decide. The trial lasts 14 days and the plan is on your calendar and watch from day one. The App Store or Google Play decides trial eligibility; if you had a TextFit trial before, it shows the price instead.

On iPhone: open Settings, tap your name, then Subscriptions and TextFit. On Android: open Google Play, tap your profile icon, then Payments & subscriptions, Subscriptions and TextFit. The app’s Settings also has a Manage subscription link. Cancel at least 24 hours before the trial ends and you won’t be charged.

If you keep the subscription, nothing changes. If you cancel, the app locks when the trial ends: the coach stops and no new workouts are pushed to your watch. Your plan, workouts and history are kept, and everything picks up where you left off when you subscribe again. Settings stays open, so you can restore a purchase, disconnect a device or delete your account.

Garmin watches and bike computers through your Garmin Connect account, Apple Watch through Apple Health and Apple’s WorkoutKit, and Wahoo ELEMNT bike computers and KICKR trainers. On Android, Health Connect brings in completed workouts, sleep and recovery. Other brands, such as COROS, Polar and Suunto, don’t get workouts from TextFit.

TextFit with Garmin

Automatically. The next 7 days of your plan are pushed as structured workouts to Garmin Connect, which syncs them to your Garmin, or scheduled on your Apple Watch. When the plan changes, the workouts on the watch are updated.

TextFit with Apple Watch

The coach works best with one: it reads your paces, heart rate and recovery data from it. Without a connected device you follow the plan in the app and mark workouts as done.

You choose a primary device. Workouts are pushed to it automatically, and when the same activity or night of sleep arrives from both, the primary device’s data wins.

From your athlete profile: sports, goal, sessions per week, day off, the longest session you can fit on a weekday and at the weekend, current fitness and whether you want strength work. The coach follows fixed rules: about 80% easy, at most two hard days a week (three above eight sessions) and never back to back, the long workout at the weekend (a long ride and a long run for a triathlon), no more than 10% more volume a week, a recovery week every fourth week, and phases from base to build, peak and taper. A deterministic validator checks every week.

The full set of plan rules

It stays on your calendar, marked as missed. Tell the coach what happened (“I was sick Tuesday and Wednesday”) and it adjusts the coming days. Every change it makes is listed in the coach chat with Undo.

Yes. When a threshold is unknown, the coach schedules a threshold test: a 30-minute run test, an FTP ramp test on the bike, or a 400 m + 200 m CSS test in the pool. Your targets come from the result.

Yes. Mark your current fitness as beginner and the first 2 to 3 weeks are almost all easy. There is no threshold test in a beginner sport’s first 4 weeks; harder sessions are set by effort or heart rate until then, and volume grows by no more than about 10% a week. If you have a health condition or are coming back from injury, check with a doctor first.

It compares last night’s HRV, resting heart rate and sleep from Garmin or Apple Health with your own normal range over the previous 28 nights and gives a 🟢, 🟡 or 🔴 verdict. On a 🟡 or 🔴 day you can tap Ease today: on 🟡, today’s hard sessions become one short easy session; on 🔴, today’s workouts are removed. Each change can be undone.

The coach runs on OpenAI, so onboarding asks for your AI consent. With it, your profile and goal, plan, activities, coach chat and recovery data (HRV, resting heart rate, sleep) from Garmin or Apple Health are sent to OpenAI to build and adjust your plan. OpenAI doesn’t use it to train its models and keeps it for up to 30 days for abuse monitoring. You can turn consent off anytime in Settings → AI consent; the coach pauses until you turn it back on. Training load, Fitness, Fatigue and Form are computed in our own code.

Privacy policy

Open Settings in the app and tap Delete account & data. This erases your account and everything linked to it. Deleting the account doesn’t cancel an App Store or Google Play subscription, so cancel that in your store settings too. You can disconnect Garmin at any time in Settings or by removing TextFit from Connected Apps in Garmin Connect.