# Gas4.0 express vs TTS Express

The clearest difference is update cadence: TTS Express at every 10 days against Gas4.0 express's monthly. TTS Express also leads on iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Gas4.0 express ships an update monthly, TTS Express every 10 days. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Gas4.0 express | TTS Express |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Size | 26 MB | 83 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [COMAPRO JOINTSTOCK COMPANY](https://appshunter.io/developer/1748514234) | [Techlogs Joint Stock Company](https://appshunter.io/developer/1707488830) |

## What reviewers say

### Gas4.0 express

[App page](https://appshunter.io/ios/app/gas40-express/id1515065732)

**Features:** macOS Compatibility

**In-app purchases:** none


### TTS Express

[App page](https://appshunter.io/ios/app/tts-express/id1612281885)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gas4.0 express free?

Gas4.0 express is free to download, with no in-app purchases.

### Is TTS Express free?

TTS Express is free to download, with no in-app purchases.

### Do Gas4.0 express or TTS Express have ads?

Neither Gas4.0 express nor TTS Express shows ads.

### Which is updated more often, Gas4.0 express or TTS Express?

Gas4.0 express ships an update monthly, and TTS Express every 10 days. Most recently, Gas4.0 express was updated on October 29, 2026 and TTS Express on November 3, 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.*