# TERRAINA vs 4SISON

The clearest difference is iOS requirement: 4SISON at 12.0 against TERRAINA's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 15, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | TERRAINA | 4SISON |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 103 MB | 62 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Jiangsu Dongcheng M&E Tools Co., Ltd.](https://appshunter.io/developer/1717367087) | [SABRE ITALIA SRL](https://appshunter.io/developer/1740695780) |

## What reviewers say

### TERRAINA

[App page](https://appshunter.io/ios/app/terraina/id6472632254)

**In-app purchases:** none


### 4SISON

[App page](https://appshunter.io/ios/app/4sison/id6484508008)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TERRAINA free?

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

### Is 4SISON free?

4SISON is free to download, with no in-app purchases.

### Do TERRAINA or 4SISON have ads?

Neither TERRAINA nor 4SISON shows ads.

### Which is updated more often, TERRAINA or 4SISON?

TERRAINA ships an update every 3 weeks, and 4SISON every 3 weeks. Most recently, TERRAINA was updated on September 15, 2026 and 4SISON on September 12, 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.*