# iContrast vs ZERO

The clearest difference is review sentiment: ZERO at 100% against iContrast's 75%. ZERO also leads on update cadence (every 5 days vs every 3 weeks) and iOS requirement (8.0 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

iContrast ships an update every 3 weeks, ZERO every 5 days. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | iContrast | ZERO |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free | Free |
| Size | 25 MB | 67 MB |
| Requires iOS | 26.0 | **8.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [福恩 毛](https://appshunter.io/developer/421941791) | [Directed Electronics Australia](https://appshunter.io/developer/1083778713) |

## What reviewers say

### iContrast

[App page](https://appshunter.io/ios/app/icontrast/id599501913)

Easily adjust the contrast and brightness of your photos, including medical images like X-rays and MRIs. Select an image, use a simple slider for adjustments, and save or share your enhanced masterpiece.

**Highlights:** Contrast and brightness adjustment, Supports photos, X-rays, and MRIs, Simple slider interface, Save and share edited images, Built-in camera integration

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

**In-app purchases:** none


### ZERO

[App page](https://appshunter.io/ios/app/zero-x-edge/id1475852524)

Control your drone directly from your smartphone or tablet. Experience first-person view (FPV) and review recorded video footage captured by your drone.

**Highlights:** Drone control via smartphone/tablet, First-person view (FPV), View recorded video, Compatible with Zero-X Edge drone

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

**In-app purchases:** none


## Frequently asked questions

### Is iContrast free?

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

### Is ZERO free?

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

### Do iContrast or ZERO have ads?

Neither iContrast nor ZERO shows ads.

### Which is updated more often, iContrast or ZERO?

iContrast ships an update every 3 weeks, and ZERO every 5 days. Most recently, iContrast was updated on October 16, 2026 and ZERO on October 5, 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.*