# e vs Source CY

The clearest difference is iOS requirement: e at 13.4 against Source CY's 16.4. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e ships an update every 3 days, Source CY every 4 days. The most recent releases landed on June 1, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | e | Source CY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Size | 27 MB | 124 MB |
| Requires iOS | **13.4** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Deputy Ministry for Research, Innovation & Digital Policy](https://appshunter.io/developer/1510330600) | [ANDRII MELNYKOV](https://appshunter.io/developer/1889626419) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-kofini/id6739127228)

**Features:** macOS Compatibility

**In-app purchases:** none


### Source CY

[App page](https://appshunter.io/ios/app/source-cy/id6775313342)

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

**In-app purchases:** none


## Frequently asked questions

### Is e free?

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

### Is Source CY free?

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

### Do e or Source CY have ads?

Neither e nor Source CY shows ads.

### Which is updated more often, e or Source CY?

e ships an update every 3 days, and Source CY every 4 days. Most recently, e was updated on June 1, 2026 and Source CY on September 18, 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.*