# Flexibility Tracker vs White Noise & Rain Sounds

The clearest difference is in-app purchases: White Noise & Rain Sounds at none against Flexibility Tracker's 4. White Noise & Rain Sounds also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Flexibility Tracker sells 4 in-app purchases, starting at $8.99 per month. White Noise & Rain Sounds asks for nothing beyond the download.

Flexibility Tracker ships an update every 3 days, White Noise & Rain Sounds every 2 days. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Flexibility Tracker | White Noise & Rain Sounds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (44 ratings)](https://appshunter.io/ios/app/flexibility-tracker-range/id6479176812/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 235 MB | 63 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Wainryb](https://appshunter.io/developer/1735069118) | [Undercover Capital LLC](https://appshunter.io/developer/1780787313) |

## What reviewers say

### Flexibility Tracker

[App page](https://appshunter.io/ios/app/flexibility-tracker-range/id6479176812)

Measure, track, and improve your physical flexibility using your phone's camera. AI-powered measurements and visual progress tracking help you achieve your stretching goals, from touching your toes to mastering the splits. Stay motivated with levels and badges.

**Highlights:** Measure joint angles with camera/photo, Track progress with pictures and data, AI-powered flexibility analysis, Compare and visualize improvements, Stay motivated with levels and badges, Tag measurements as 'Warm' or 'Cold'

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly member | $8.99 | per month |
| Monthly member | $12.99 | per month |
| Annual member | $39.99 | per year |
| Yearly member | $39.99 | per year |


### White Noise & Rain Sounds

[App page](https://appshunter.io/ios/app/white-noise-and-rain-sounds/id6799249648)

**In-app purchases:** none


## Frequently asked questions

### Is Flexibility Tracker free?

Flexibility Tracker is free to download, with in-app purchases available.

### Is White Noise & Rain Sounds free?

White Noise & Rain Sounds is free to download, with no in-app purchases.

### Do Flexibility Tracker or White Noise & Rain Sounds have ads?

Neither Flexibility Tracker nor White Noise & Rain Sounds shows ads.

### Which is updated more often, Flexibility Tracker or White Noise & Rain Sounds?

Flexibility Tracker ships an update every 3 days, and White Noise & Rain Sounds every 2 days. Most recently, Flexibility Tracker was updated on October 24, 2026 and White Noise & Rain Sounds on October 29, 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.*