# MTL vs String Theory!

The clearest difference is price: String Theory! at Free against MTL's $4.99. MTL's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

String Theory! is free to download; MTL costs $4.99 up front. String Theory! sells 3 in-app purchases, starting at $2.99 per 7 days. MTL asks for nothing beyond the download.

## The numbers

| Metric | MTL | String Theory! |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | — |
| Size | 35 MB | 56 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tulio Calazans](https://appshunter.io/developer/1506825273) | [Synthify Inc](https://appshunter.io/developer/1089257745) |

## What reviewers say

### MTL

[App page](https://appshunter.io/ios/app/mtl-my-timeline-pro/id6458192117)

**Features:** macOS Compatibility

**In-app purchases:** none


### String Theory!

[App page](https://appshunter.io/ios/app/string-theory/id6757779491)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Yearly | $24.99 | per year |
| One Time | $29.99 | one-time |


## Frequently asked questions

### Is MTL free?

MTL costs $4.99, with no in-app purchases.

### Is String Theory! free?

String Theory! is free to download, with in-app purchases available.

### Do MTL or String Theory! have ads?

String Theory! shows ads; MTL 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.*