# CY Fuel vs Source CY

CY Fuel and Source CY are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CY Fuel ships an update every 9 days, Source CY every 4 days. The most recent releases landed on December 10, 2025 and September 18, 2026 respectively.

## The numbers

| Metric | CY Fuel | Source CY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 4 days** |
| Size | 8 MB | 124 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [David Kababyan](https://appshunter.io/developer/1051403068) | [ANDRII MELNYKOV](https://appshunter.io/developer/1889626419) |

## What reviewers say

### CY Fuel

[App page](https://appshunter.io/ios/app/cy-fuel/id1627731629)

**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 CY Fuel free?

CY Fuel 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 CY Fuel or Source CY have ads?

Neither CY Fuel nor Source CY shows ads.

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

CY Fuel ships an update every 9 days, and Source CY every 4 days. Most recently, CY Fuel was updated on December 10, 2025 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.*