# Aceto vs Sky Engine

Aceto and Sky Engine 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.

Aceto ships an update weekly, Sky Engine every 5 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Aceto | Sky Engine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 37 MB | 39 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fitz Inc.](https://appshunter.io/developer/1335277809) | [Chase Your Sky LLC](https://appshunter.io/developer/1876015188) |

## What reviewers say

### Aceto

[App page](https://appshunter.io/ios/app/aceto/id1613160197)

**Features:** Vision Pro support

**In-app purchases:** none


### Sky Engine

[App page](https://appshunter.io/ios/app/sky-engine-clarity-journal/id6780538379)

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

**In-app purchases:** none


## Frequently asked questions

### Is Aceto free?

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

### Is Sky Engine free?

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

### Do Aceto or Sky Engine have ads?

Neither Aceto nor Sky Engine shows ads.

### Which is updated more often, Aceto or Sky Engine?

Aceto ships an update weekly, and Sky Engine every 5 days. Most recently, Aceto was updated on November 7, 2026 and Sky Engine on October 31, 2026.

---

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