# Acuter Sky vs EWINBOX

The clearest difference is iOS requirement: EWINBOX at 12.0 against Acuter Sky's 14.0. 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Acuter Sky | EWINBOX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free |
| Size | 138 MB | 223 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiangsu Mark Optoelectronic Instrument Co., Ltd](https://appshunter.io/developer/1683472214) | [BOE Yiyun Technology Co., Ltd.](https://appshunter.io/developer/1267195265) |

## What reviewers say

### Acuter Sky

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

**Features:** macOS Compatibility

**In-app purchases:** none


### EWINBOX

[App page](https://appshunter.io/ios/app/ewinbox/id6505099399)

This utility allows you to personalize your phone case by displaying custom photos or text on its ink screen. Utilize your phone's NFC to transfer designs for a long-lasting, unique look. The app offers a variety of materials and theme options for DIY creation.

**Highlights:** Customizable ink screen display, NFC photo and text transfer, Personalized DIY themes, Large library of design materials, Regular theme content updates

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

**In-app purchases:** none


## Frequently asked questions

### Is Acuter Sky free?

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

### Is EWINBOX free?

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

### Do Acuter Sky or EWINBOX have ads?

Neither Acuter Sky nor EWINBOX shows ads.

### Which is updated more often, Acuter Sky or EWINBOX?

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