# Xeno vs MemDatStack

The clearest difference is price: MemDatStack at Free against Xeno's $59.99. MemDatStack also leads on in-app purchases (none vs 3) and update cadence (every 9 days vs every 3 months). Xeno's advantage is ratings volume (64 vs 1). On rating, ads, device support and iOS requirement there is nothing between them.

MemDatStack is free to download; Xeno costs $59.99 up front. Xeno 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 — 4.9 for Xeno against 5.0 for MemDatStack. That said, the two scores are not equally well evidenced: Xeno has 64 ratings behind it against 1, so its average is the more settled of the two.

Xeno ships an update every 3 months, MemDatStack every 9 days. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Xeno | MemDatStack |
| --- | --- | --- |
| Price | $59.99 | **Free** |
| Rating | [4.9 (64 ratings)](https://appshunter.io/ios/app/xeno-reveal-a-thought/id1242975358/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memdatstack/id6766251270/reviews)** |
| Number of ratings | **64** | 1 |
| Positive reviews | 88.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 26 MB | 6 MB |
| Requires iOS | **17.6** | 18.6 |
| Devices | iPhone, Apple Watch | 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

### Xeno

[App page](https://appshunter.io/ios/app/xeno-reveal-a-thought/id1242975358)

This app allows you to reveal a spectator's thoughts without them writing, drawing, or typing anything. Perform remotely over video or audio calls, or use it with any website via AI peek and anagram features. Integrates with various devices and services for a seamless experience.

**Highlights:** Reveal spectator's thoughts, Remote performance capability, AI Peek feature, Transgressive anagram feature, IMDb movie integration, PeekSmith and Bluetooth Remote support, Apple Watch app integration

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Xeno AI Credits | $6.99 | one-time |
| Xeno: Anywhere | $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 Xeno free?

Xeno costs $59.99, and also offers in-app purchases.

### Is MemDatStack free?

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

### Which has better reviews, Xeno or MemDatStack?

MemDatStack is rated higher. Xeno averages 4.9 out of 5 from 64 ratings, while MemDatStack averages 5.0 from 1 ratings.

### Do Xeno or MemDatStack have ads?

Neither Xeno nor MemDatStack shows ads.

### Which is updated more often, Xeno or MemDatStack?

Xeno ships an update every 3 months, and MemDatStack every 9 days. Most recently, Xeno was updated on October 18, 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.*