The short answer#
Check whether your watch supports Training Readiness first. If it does, you already have a capable readiness score, free, from the device you own — and you should be clear about what a second app adds before paying for one.
If your watch does not support it, or you wear something that is not a Garmin, or you want the training plan and fuelling side as well, that is where Shindo comes in.
The watch list matters more than anything else here#
Training Readiness is a device feature, not a Garmin Connect feature. It is computed on the watch and shown in the app, so owning Garmin Connect is not enough — the watch has to support it.
As of 2026 it is available on the Forerunner 70, 170, 265, 570, 955, 965 and 970, and the fenix 7, fenix 7 Pro, fenix 8 and fenix E, among others. It is not on the Forerunner 55, Forerunner 165, Forerunner 255, Venu 3, Vivoactive 5 or Vivoactive 6.
Verify against Garmin’s own device page before deciding — the list moves with firmware, and this one was checked on 2026-08-29.
A Garmin Connect Plus subscription is not required for Training Readiness; the score, its 30-day trend and its contributing factors are in the free app.
What each one is#
Garmin Connect is Garmin’s companion platform, free with any Garmin device. On supported watches it provides Training Readiness (built from HRV status, sleep, recovery time, Body Battery, stress and recent load), Training Status, Training Load focus, race predictors and a workout library, plus the ability to push structured workouts to the watch.
Shindo is an iPhone app that reads Apple Health rather than talking to any device directly. It computes readiness with four named drivers, models training load per sport into fitness, fatigue and form, generates and adapts a weekly plan, and sets nutrition targets from the load you actually did.
Where they differ#
| Shindo | Garmin Connect | |
|---|---|---|
| Hardware required | Any device that writes to Apple Health | A Garmin, and for readiness a supported model |
| Readiness score | Yes, all devices, four drivers | Yes, on supported watches only |
| Fitness / fatigue / form | CTL, ATL, TSB explicitly | Training Status and Load focus, different framing |
| Generates a weekly plan | Yes — phases, 80/20, ramp cap, adapts | Garmin Coach plans for some distances |
| Adapts when you miss a week | Re-flows the block from where you are | Plans adjust within their own logic |
| Sends workouts to a watch | No | Yes |
| Nutrition | Calorie and macro targets from the day’s load | Logging via third-party integrations |
| Written explanation | Yes, a morning report in words | Numbers and short labels |
| Cost | Free; Pro $12.99/mo or $109.99/yr | Free with the device |
| Platform | iPhone only | iOS, Android, web |
Checked 2026-08-29 against each vendor’s public documentation.
Being honest about the overlap#
If you own a Forerunner 965 and want to know whether to train hard today, Garmin already answers that, free, and it does so using a sensor on your wrist all night. Shindo does not have a better sensor — it has the same data, arriving through Apple Health.
So the case for Shindo alongside a supported Garmin is not “a better readiness score”. It is:
- A plan that is built and re-flowed for you, across running, cycling, swimming, strength and triathlon, rather than a plan for one race distance.
- Explicit fitness, fatigue and form on the conventional 42-day and 7-day constants, rather than Garmin’s own framing.
- Fuelling tied to load, including energy availability and carbohydrate adherence.
- A published methodology. Garmin’s algorithms, developed with Firstbeat Analytics, are proprietary; Shindo’s methodology names every constant it uses.
- Coverage when you switch devices. Readiness that lives in the watch ends when the watch does.
When Garmin Connect is enough#
- Your watch supports Training Readiness and you only need the daily score. You already have it, free.
- You want workouts pushed to the watch. Shindo sends nothing to any device.
- You are on Android, or want the web view.
- You are deep in the Garmin ecosystem and want one place for everything.
- You do not want another subscription. Entirely reasonable.
When Shindo fits better#
- Your Garmin does not support Training Readiness, or you wear an Apple Watch, a Polar, a Coros or a chest strap.
- You want the training plan and the fuelling, not only the recovery number.
- You are multi-sport and want load scored per sport onto one fatigue curve.
- You want the maths published rather than proprietary.
- You want the whole picture on your phone, computed on the device, with no account.
Running both#
Common, and it works. A Garmin watch mirrors its activities into Apple Health, which is where Shindo reads them — so the watch keeps doing the measuring and Shindo does the planning. Shindo never writes a workout anywhere, so it cannot disturb anything on the Garmin side.
Read next
Why your watch's VO2max estimate moves, and what it actually means
Marathon training with just an iPhone and Apple Health
Shindo vs TrainingPeaks
Shindo vs Whoop
Shindo is free on the App Store — readiness, the weekly plan and the load charts need no subscription.