# Respondos vs Kosti

The clearest difference is in-app purchases: Respondos at none against Kosti's 1. Respondos also leads on ads (none vs shown) and update cadence (every 3 days vs every 4 months). On price and device support there is nothing between them.

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

Respondos ships an update every 3 days, Kosti every 4 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Respondos | Kosti |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 4 months |
| Size | 8 MB | 38 MB |
| Requires iOS | **14.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Miras Maratov](https://appshunter.io/developer/1732427438) | [Aliaksandr Patskevich](https://appshunter.io/developer/1874179271) |

## What reviewers say

### Respondos

[App page](https://appshunter.io/ios/app/respondos/id6478282593)

**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 Respondos free?

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

### Is Kosti free?

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

### Do Respondos or Kosti have ads?

Kosti shows ads; Respondos does not.

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

Respondos ships an update every 3 days, and Kosti every 4 months. Most recently, Respondos was updated on October 30, 2026 and Kosti on October 31, 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.*