# linkSelf vs Compatibility

The clearest difference is rating: Compatibility at 3.9 against linkSelf's 3.3. Compatibility also leads on review sentiment (60% vs 50%). linkSelf's advantage is in-app purchases (none vs 2) and iOS requirement (8.0 vs 16.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Compatibility sells 2 in-app purchases, starting at $1.99 per month. linkSelf asks for nothing beyond the download.

Compatibility holds the better App Store score, 3.9 against 3.3. Both are backed by a comparable volume of ratings — 4 and 11 respectively. Written reviews point the same way: 50% of linkSelf's written reviews are positive against 60% of Compatibility's.

linkSelf ships an update every 3 weeks, Compatibility every 2 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | linkSelf | Compatibility |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/linkself/id1267763137/reviews) | **[3.9 (11 ratings)](https://appshunter.io/ios/app/compatibility-vitamin/id6471350845/reviews)** |
| Number of ratings | 4 | **11** |
| Positive reviews | 50.0% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 60 MB | 62 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [嘉豪 余](https://appshunter.io/developer/1094145945) | [Ivan Akimov](https://appshunter.io/developer/1715134273) |

## What reviewers say

### linkSelf

[App page](https://appshunter.io/ios/app/linkself/id1267763137)

Monitor your health and fitness with a connected Bluetooth smartband. Track exercise, sleep, blood pressure, and blood oxygen levels. Receive smart alarms and phone notifications directly from your band.

**Highlights:** Exercise tracking, Sleep monitoring, Blood pressure monitoring, Blood oxygen monitoring, Smart alarm clock, Call/reminder notifications, Social media sharing, Health app synchronization

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

**In-app purchases:** none


### Compatibility

[App page](https://appshunter.io/ios/app/compatibility-vitamin/id6471350845)

This app helps you create a safe and effective vitamin and mineral intake schedule by considering their compatibility and antagonism. It optimizes absorption by timing intakes correctly and provides an informative database for each nutrient.

**Highlights:** Personalized intake schedule, Optimized nutrient absorption, Informational vitamin database, Intuitive diet planning interface, Minimizes antagonistic reactions

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Annual Subscription | $8.99 | per year |


## Frequently asked questions

### Is linkSelf free?

linkSelf is free to download, with no in-app purchases.

### Is Compatibility free?

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

### Which has better reviews, linkSelf or Compatibility?

Compatibility is rated higher. linkSelf averages 3.3 out of 5 from 4 ratings, while Compatibility averages 3.9 from 11 ratings.

### Do linkSelf or Compatibility have ads?

Neither linkSelf nor Compatibility shows ads.

### Which is updated more often, linkSelf or Compatibility?

linkSelf ships an update every 3 weeks, and Compatibility every 2 weeks. Most recently, linkSelf was updated on October 3, 2026 and Compatibility on October 10, 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.*