# PROST vs Eşref Saati

The clearest difference is in-app purchases: PROST at none against Eşref Saati's 1. PROST also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.0). Eşref Saati's advantage is update cadence (every 6 days vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Eşref Saati sells 1 one-off in-app purchase. PROST asks for nothing beyond the download.

PROST ships an update every 4 months, Eşref Saati every 6 days. The most recent releases landed on September 25, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PROST | Eşref Saati |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 6 days** |
| Size | 61 MB | 22 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SENYONET YAZILIM ANONIM SIRKETI](https://appshunter.io/developer/1391061022) | [Omer Eyibardakci](https://appshunter.io/developer/1857425316) |

## What reviewers say

### PROST

[App page](https://appshunter.io/ios/app/prost/id6499310563)

**Features:** macOS Compatibility

**In-app purchases:** none


### Eşref Saati

[App page](https://appshunter.io/ios/app/esref-saati/id6755933600)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reset Focus Timer | $1.99 | one-time |


## Frequently asked questions

### Is PROST free?

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

### Is Eşref Saati free?

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

### Do PROST or Eşref Saati have ads?

Eşref Saati shows ads; PROST does not.

### Which is updated more often, PROST or Eşref Saati?

PROST ships an update every 4 months, and Eşref Saati every 6 days. Most recently, PROST was updated on September 25, 2026 and Eşref Saati on October 4, 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.*