# Stretch Strong vs CheckIn Pro

The clearest difference is update cadence: CheckIn Pro at every 2 days against Stretch Strong's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stretch Strong sells 3 in-app purchases, starting at $8.99 per month and CheckIn Pro sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Stretch Strong ships an update every 3 months, CheckIn Pro every 2 days. The most recent releases landed on July 5, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Stretch Strong | CheckIn Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (62 ratings)](https://appshunter.io/ios/app/stretch-strong/id6473756642/reviews)** | — |
| Number of ratings | **62** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 139 MB | 83 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Trainmakr LLC](https://appshunter.io/developer/1719702859) | [Steve Yu](https://appshunter.io/developer/1891894708) |

## What reviewers say

### Stretch Strong

[App page](https://appshunter.io/ios/app/stretch-strong/id6473756642)

Access a vast library of over 400 stretching exercises with video demonstrations and expert-led weekly workouts. Find specific stretches for your sport or needs with powerful search and filtering tools. Track your progress with an in-app journal.

**Highlights:** 400+ stretching exercises with video demonstrations, Expert-led weekly flexibility workouts, Search, filter, and substitute functions, Novice and experienced training tracks, In-app training journal, Tutorial videos and FAQ resource library

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $8.99 | per month |
| Quarterly | $25.00 | per 3 months |
| Yearly | $89.99 | per year |


### CheckIn Pro

[App page](https://appshunter.io/ios/app/checkin-pro-physique-tracker/id6785522011)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CheckIn Pro Monthly | $2.99 | per month |
| CheckIn Pro Annual Subscription | $24.99 | per year |


## Frequently asked questions

### Is Stretch Strong free?

Stretch Strong is free to download, with in-app purchases available.

### Is CheckIn Pro free?

CheckIn Pro is free to download, with in-app purchases available.

### Do Stretch Strong or CheckIn Pro have ads?

Neither Stretch Strong nor CheckIn Pro shows ads.

### Which is updated more often, Stretch Strong or CheckIn Pro?

Stretch Strong ships an update every 3 months, and CheckIn Pro every 2 days. Most recently, Stretch Strong was updated on July 5, 2026 and CheckIn Pro on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*