# Visolve for iPhone vs Gnossy

The clearest difference is in-app purchases: Visolve for iPhone at none against Gnossy's 4. Visolve for iPhone also leads on iOS requirement (11.0 vs 15.1). Gnossy's advantage is update cadence (every 5 days vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. Gnossy sells 4 in-app purchases, starting at $9.99 per month. Visolve for iPhone asks for nothing beyond the download.

Visolve for iPhone ships an update every 11 months, Gnossy every 5 days. The most recent releases landed on October 7, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Visolve for iPhone | Gnossy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/visolve-for-iphone/id324196121/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 4 MB | 75 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Ryobi Systems Co.,Ltd.](https://appshunter.io/developer/422237051) | [Giuliano Skara](https://appshunter.io/developer/1863081205) |

## What reviewers say

### Visolve for iPhone

[App page](https://appshunter.io/ios/app/visolve-for-iphone/id324196121)

This utility app assists individuals with color vision deficiency by transforming images and webpages to enhance color distinction. It offers various filters and simulations to help users perceive colors differently or understand how color-blind individuals see the world.

**Highlights:** Red-Green color transform, Blue-Yellow color transform, Saturation increase, Color filtering, Hatching patterns, Color blindness simulation, Image and webpage transformation

**Features:** macOS Compatibility

**In-app purchases:** none


### Gnossy

[App page](https://appshunter.io/ios/app/gnossy/id6756816637)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Monats Abonnement | $9.99 | per month |
| 3 Monats Abonnement | $29.99 | per 3 months |
| 6 Monats Abonnement | $59.99 | per 6 months |
| GnossyYear Plan | $99.99 | per year |


## Frequently asked questions

### Is Visolve for iPhone free?

Visolve for iPhone is free to download, with no in-app purchases.

### Is Gnossy free?

Gnossy is free to download, with in-app purchases available.

### Do Visolve for iPhone or Gnossy have ads?

Neither Visolve for iPhone nor Gnossy shows ads.

### Which is updated more often, Visolve for iPhone or Gnossy?

Visolve for iPhone ships an update every 11 months, and Gnossy every 5 days. Most recently, Visolve for iPhone was updated on October 7, 2026 and Gnossy 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.*