# Koslan vs Calgrow Mobile

The clearest difference is update cadence: Calgrow Mobile at weekly against Koslan's monthly. 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.

Koslan ships an update monthly, Calgrow Mobile weekly. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Koslan | Calgrow Mobile |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 65 MB | 73 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Desarrollo Web SPA](https://appshunter.io/developer/1587233686) | [Tectronix SpA](https://appshunter.io/developer/1511075014) |

## What reviewers say

### Koslan

[App page](https://appshunter.io/ios/app/koslan/id1637106895)

**In-app purchases:** none


### Calgrow Mobile

[App page](https://appshunter.io/ios/app/calgrow-mobile/id6480926274)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Koslan free?

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

### Is Calgrow Mobile free?

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

### Do Koslan or Calgrow Mobile have ads?

Neither Koslan nor Calgrow Mobile shows ads.

### Which is updated more often, Koslan or Calgrow Mobile?

Koslan ships an update monthly, and Calgrow Mobile weekly. Most recently, Koslan was updated on October 18, 2026 and Calgrow Mobile on October 10, 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.*