# KOWOLL 28E vs 4SISON

The clearest difference is iOS requirement: KOWOLL 28E at 10.0 against 4SISON's 12.0. 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 19, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | KOWOLL 28E | 4SISON |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 45 MB | 62 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kalman Navigation](https://appshunter.io/developer/1363987394) | [SABRE ITALIA SRL](https://appshunter.io/developer/1740695780) |

## What reviewers say

### KOWOLL 28E

[App page](https://appshunter.io/ios/app/kowoll-28e/id6443854438)

**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 KOWOLL 28E free?

KOWOLL 28E is free to download, with no in-app purchases.

### Is 4SISON free?

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

### Do KOWOLL 28E or 4SISON have ads?

Neither KOWOLL 28E nor 4SISON shows ads.

### Which is updated more often, KOWOLL 28E or 4SISON?

KOWOLL 28E ships an update every 3 weeks, and 4SISON every 3 weeks. Most recently, KOWOLL 28E was updated on September 19, 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.*