# String Tension AI vs Stringbed

String Tension AI and Stringbed are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. String Tension AI sells 3 in-app purchases, starting at $4.99 per month and Stringbed sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

String Tension AI ships an update every 4 days, Stringbed every 5 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | String Tension AI | Stringbed |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Freemium | — |
| Size | 84 MB | 7 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Trader Prosperity LLC](https://appshunter.io/developer/1895443729) | [Laure Shin](https://appshunter.io/developer/6785226025) |

## What reviewers say

### 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 |


### Stringbed

[App page](https://appshunter.io/ios/app/stringbed-string-tension/id6812965445)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited answers | $14.99 | one-time |


## Frequently asked questions

### Is String Tension AI free?

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

### Is Stringbed free?

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

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

Neither String Tension AI nor Stringbed shows ads.

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

String Tension AI ships an update every 4 days, and Stringbed every 5 days. Most recently, String Tension AI was updated on October 31, 2026 and Stringbed on November 6, 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.*