# StringIt vs String Tension AI

The clearest difference is in-app purchases: StringIt at none against String Tension AI's 3. StringIt also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.0). String Tension AI's advantage is update cadence (every 4 days vs fortnightly). On price and ads there is nothing between them.

Both are free to download. String Tension AI sells 3 in-app purchases, starting at $4.99 per month. StringIt asks for nothing beyond the download.

StringIt ships an update fortnightly, String Tension AI every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | StringIt | String Tension AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/string-tension-ai-tennis/id6763697805/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 9 MB | 84 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Campbell](https://appshunter.io/developer/1648120866) | [Trader Prosperity LLC](https://appshunter.io/developer/1895443729) |

## What reviewers say

### StringIt

[App page](https://appshunter.io/ios/app/stringit/id6757498723)

**Features:** macOS Compatibility

**In-app purchases:** none


### String Tension AI

[App page](https://appshunter.io/ios/app/string-tension-ai-tennis/id6763697805)

This app uses your iPhone's microphone to measure the tension of your racquet strings. It tracks tension decay over time, offers personalized restring recommendations, and provides a comprehensive string toolkit for serious players.

**Highlights:** Measure string tension with iPhone microphone, Track tension decay over time, Personalized restring recommendations, String database and player setups, Playing session tracking, Cost tracking for restringing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly PRO | $4.99 | per month |
| Annual PRO | $29.99 | per year |
| Lifetime PRO | $69.99 | one-time |


## Frequently asked questions

### Is StringIt free?

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

### Is String Tension AI free?

String Tension AI is free to download, with in-app purchases available.

### Do StringIt or String Tension AI have ads?

Neither StringIt nor String Tension AI shows ads.

### Which is updated more often, StringIt or String Tension AI?

StringIt ships an update fortnightly, and String Tension AI every 4 days. Most recently, StringIt was updated on October 31, 2026 and String Tension AI on October 31, 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.*