# Hello Helsinki vs MemDatStack

The clearest difference is update cadence: MemDatStack at every 9 days against Hello Helsinki's every 17 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Hello Helsinki ships an update every 17 months, MemDatStack every 9 days. The most recent releases landed on September 5, 2026 and July 3, 2026 respectively.

## The numbers

| Metric | Hello Helsinki | MemDatStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memdatstack/id6766251270/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 11 MB | 6 MB |
| Requires iOS | 18.6 | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hoang Nam Nguyen](https://appshunter.io/developer/884699554) | [Circe Apps LLC](https://appshunter.io/developer/1896252845) |

## What reviewers say

### Hello Helsinki

[App page](https://appshunter.io/ios/app/hello-helsinki/id6450460936)

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

**In-app purchases:** none


### 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 Hello Helsinki free?

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

### Is MemDatStack free?

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

### Do Hello Helsinki or MemDatStack have ads?

Neither Hello Helsinki nor MemDatStack shows ads.

### Which is updated more often, Hello Helsinki or MemDatStack?

Hello Helsinki ships an update every 17 months, and MemDatStack every 9 days. Most recently, Hello Helsinki was updated on September 5, 2026 and MemDatStack on July 3, 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.*