# Stack Trainer vs HAKI

The clearest difference is price: HAKI at Free against Stack Trainer's $3.99. Stack Trainer's advantage is update cadence (every 3 months vs every 6 months) and iOS requirement (15.6 vs 18.5). On ads, in-app purchases and device support there is nothing between them.

HAKI is free to download; Stack Trainer costs $3.99 up front. Stack Trainer sells 2 in-app purchases, starting at $1.99 per 3 months and HAKI sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Stack Trainer ships an update every 3 months, HAKI every 6 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | Stack Trainer | HAKI |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/stack-trainer/id646458442/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Subscription | — |
| Size | 6 MB | 1 MB |
| Requires iOS | **15.6** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ralph Cos](https://appshunter.io/developer/573505028) | [泉州丰泽哈基科技有限公司](https://appshunter.io/developer/1820828240) |

## What reviewers say

### Stack Trainer

[App page](https://appshunter.io/ios/app/stack-trainer/id646458442)

This app provides a realistic card deck experience for close-up magicians to train their memory of card stacks. It offers various challenge modes and filters to aid learning and practice, with a focus on a clean, distraction-free interface.

**Highlights:** Realistic card deck simulation, Multiple mnemonic training approaches, Customizable stack filters, Lorrayne's peg words integration, Interactive quick-touch analyzer, Display and whisper modes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months Subscription | $1.99 | per 3 months |
| Annual Subscription | $2.99 | per year |


### HAKI

[App page](https://appshunter.io/ios/app/haki-kamoji/id6747635344)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HAKI Kamoji PRO | $1.99 | one-time |


## Frequently asked questions

### Is Stack Trainer free?

Stack Trainer costs $3.99, and also offers in-app purchases.

### Is HAKI free?

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

### Do Stack Trainer or HAKI have ads?

Neither Stack Trainer nor HAKI shows ads.

### Which is updated more often, Stack Trainer or HAKI?

Stack Trainer ships an update every 3 months, and HAKI every 6 months. Most recently, Stack Trainer was updated on October 7, 2026 and HAKI on October 7, 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.*