# Acuter Sky vs Track Sun

The clearest difference is update cadence: Acuter Sky at every 2 months against Track Sun's every 5 months. 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.

Acuter Sky ships an update every 2 months, Track Sun every 5 months. The most recent releases landed on October 30, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Acuter Sky | Track Sun |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 138 MB | 43 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiangsu Mark Optoelectronic Instrument Co., Ltd](https://appshunter.io/developer/1683472214) | [SynUe Tech. Co., Ltd](https://appshunter.io/developer/1475652738) |

## What reviewers say

### Acuter Sky

[App page](https://appshunter.io/ios/app/acuter-sky/id6448405217)

**Features:** macOS Compatibility

**In-app purchases:** none


### Track Sun

[App page](https://appshunter.io/ios/app/track-sun/id6737474745)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Acuter Sky free?

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

### Is Track Sun free?

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

### Do Acuter Sky or Track Sun have ads?

Neither Acuter Sky nor Track Sun shows ads.

### Which is updated more often, Acuter Sky or Track Sun?

Acuter Sky ships an update every 2 months, and Track Sun every 5 months. Most recently, Acuter Sky was updated on October 30, 2026 and Track Sun on November 8, 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.*