# Rollify vs Kosti

The clearest difference is in-app purchases: Rollify at none against Kosti's 1. Rollify also leads on ads (none vs shown) and update cadence (weekly vs every 8 months). On price and device support there is nothing between them.

Both are free to download. Kosti sells 1 one-off in-app purchase. Rollify asks for nothing beyond the download.

Rollify ships an update weekly, Kosti every 8 months. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Rollify | Kosti |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 8 months |
| Size | 40 MB | 38 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tayyip GUZEL](https://appshunter.io/developer/1725439319) | [Aliaksandr Patskevich](https://appshunter.io/developer/1874179271) |

## What reviewers say

### Rollify

[App page](https://appshunter.io/ios/app/rollify-random-selection/id6737737670)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Kosti

[App page](https://appshunter.io/ios/app/kosti/id6758647579)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Rollify free?

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

### Is Kosti free?

Kosti is free to download, with in-app purchases available.

### Do Rollify or Kosti have ads?

Kosti shows ads; Rollify does not.

### Which is updated more often, Rollify or Kosti?

Rollify ships an update weekly, and Kosti every 8 months. Most recently, Rollify was updated on October 16, 2026 and Kosti on October 20, 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.*