# StringTension vs Tension Lab

The clearest difference is in-app purchases: Tension Lab at none against StringTension's 3. Tension Lab also leads on iOS requirement (15.1 vs 26.2). On price, ads 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. Tension Lab asks for nothing beyond the download.

## The numbers

| Metric | StringTension | Tension Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 4 MB | 72 MB |
| Requires iOS | 26.2 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Huopu Software Co., Ltd.](https://appshunter.io/developer/1893871919) | [SEOKWON KONG](https://appshunter.io/developer/6803808680) |

## 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 |


### Tension Lab

[App page](https://appshunter.io/ios/app/tension-lab-string-tension/id6803808678)

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

**In-app purchases:** none


## Frequently asked questions

### Is StringTension free?

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

### Is Tension Lab free?

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

### Do StringTension or Tension Lab have ads?

Neither StringTension nor Tension Lab shows ads.

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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.*