# Onyx Magic vs MemDatStack

The clearest difference is price: MemDatStack at Free against Onyx Magic's $64.99. MemDatStack also leads on in-app purchases (none vs 2). Onyx Magic's advantage is ratings volume (13 vs 1). On rating, update cadence, ads and device support there is nothing between them.

MemDatStack is free to download; Onyx Magic costs $64.99 up front. Onyx Magic sells 2 one-off in-app purchases. MemDatStack asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Onyx Magic against 5.0 for MemDatStack. That said, the two scores are not equally well evidenced: Onyx Magic has 13 ratings behind it against 1, so its average is the more settled of the two.

Onyx Magic ships an update fortnightly, MemDatStack every 9 days. Both last shipped on October 5, 2026.

## The numbers

| Metric | Onyx Magic | MemDatStack |
| --- | --- | --- |
| Price | $64.99 | **Free** |
| Rating | [5.0 (13 ratings)](https://appshunter.io/ios/app/onyx-magic/id6756542102/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/memdatstack/id6766251270/reviews) |
| Number of ratings | **13** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 36 MB | 6 MB |
| Requires iOS | **18.2** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Marc Kerstein](https://appshunter.io/developer/821255617) | [Circe Apps LLC](https://appshunter.io/developer/1896252845) |

## What reviewers say

### Onyx Magic

[App page](https://appshunter.io/ios/app/onyx-magic/id6756542102)

This utility uses AI to remotely alter captured photos in real-time. It allows for seamless modifications to images moments after they are taken, directly on a spectator's device. Create impossible effects like changing playing cards, revealing hidden messages, or altering clock times within photos.

**Highlights:** Real-time AI photo modification, Remote image alteration, Spectator's camera integration, Physical photo printing (Onyx Print), Third-party app integrations, Variable delayed input

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Onyx Credits | $19.99 | one-time |
| Onyx Print | $49.99 | one-time |


### MemDatStack

[App page](https://appshunter.io/ios/app/memdatstack/id6766251270)

This tool assists magicians in memorizing card stacks with customizable quizzes. It supports various popular stacks and question types, offering detailed feedback on incorrect answers to improve learning.

**Highlights:** Supports multiple popular card stacks, Variety of quiz settings, Customizable quiz questions, Tracks recent quiz results, Reviews incorrect answers, Audio feedback option

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Onyx Magic free?

Onyx Magic costs $64.99, and also offers in-app purchases.

### Is MemDatStack free?

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

### Which has better reviews, Onyx Magic or MemDatStack?

Onyx Magic and MemDatStack are both rated 5.0 out of 5 on the App Store, from 13 and 1 ratings respectively.

### Do Onyx Magic or MemDatStack have ads?

Neither Onyx Magic nor MemDatStack shows ads.

### Which is updated more often, Onyx Magic or MemDatStack?

Onyx Magic ships an update fortnightly, and MemDatStack every 9 days. Most recently, Onyx Magic was updated on October 5, 2026 and MemDatStack 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.*