# String Tension Meter vs Tension Lab

The clearest difference is in-app purchases: Tension Lab at none against String Tension Meter's 2. Tension Lab also leads on ads (none vs shown). String Tension Meter's advantage is iOS requirement (13.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. String Tension Meter sells 2 in-app purchases, starting at $0.99 per month. Tension Lab asks for nothing beyond the download.

## The numbers

| Metric | String Tension Meter | Tension Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | — | Daily |
| Size | 32 MB | 59 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tzu Yu Chou](https://appshunter.io/developer/1887902380) | [SEOKWON KONG](https://appshunter.io/developer/6803808680) |

## What reviewers say

### String Tension Meter

[App page](https://appshunter.io/ios/app/string-tension-meter/id6782812710)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $5.99 | per year |


### Tension Lab

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is String Tension Meter free?

String Tension Meter 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 String Tension Meter or Tension Lab have ads?

String Tension Meter shows ads; Tension Lab does not.

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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.*