# StringTension vs String Tension AI

The clearest difference is iOS requirement: String Tension AI at 17.0 against StringTension's 26.2. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. StringTension sells 3 in-app purchases, starting at $0.99 per month and String Tension AI sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | StringTension | String Tension AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/string-tension-ai/id6763697805/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | — | Freemium |
| Size | 4 MB | 33 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Huopu Software Co., Ltd.](https://appshunter.io/developer/1893871919) | [Trader Prosperity LLC](https://appshunter.io/developer/1895443729) |

## What reviewers say

### StringTension

[App page](https://appshunter.io/ios/app/stringtension/id6761807131)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StringTension Pro (Monthly) | $0.99 | per month |
| StringTension Pro (Yearly) | $5.99 | per year |
| StringTension Pro (Lifetime) | $11.99 | one-time |


### String Tension AI

[App page](https://appshunter.io/ios/app/string-tension-ai/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 StringTension free?

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

### Is String Tension AI free?

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

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

Neither StringTension nor String Tension AI shows ads.

---

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