# Knopka.ca vs Радио Сахаров

The clearest difference is update cadence: Knopka.ca at fortnightly against Радио Сахаров's every 2 months. Радио Сахаров's advantage is iOS requirement (13.0 vs 15.0). 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.

Knopka.ca ships an update fortnightly, Радио Сахаров every 2 months. The most recent releases landed on August 25, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Knopka.ca | Радио Сахаров |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 26 MB | 36 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Media Plus Solutions Inc](https://appshunter.io/developer/961122781) | [Correctiv Recherchen gGmbH](https://appshunter.io/developer/1438879120) |

## What reviewers say

### Knopka.ca

[App page](https://appshunter.io/ios/app/knopkaca/id1545383810)

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

**In-app purchases:** none


### Радио Сахаров

[App page](https://appshunter.io/ios/app/id6446361786)

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

**In-app purchases:** none


## Frequently asked questions

### Is Knopka.ca free?

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

### Is Радио Сахаров free?

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

### Do Knopka.ca or Радио Сахаров have ads?

Neither Knopka.ca nor Радио Сахаров shows ads.

### Which is updated more often, Knopka.ca or Радио Сахаров?

Knopka.ca ships an update fortnightly, and Радио Сахаров every 2 months. Most recently, Knopka.ca was updated on August 25, 2026 and Радио Сахаров on September 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*