# Stack Trainer vs Nibble

The clearest difference is price: Nibble at Free against Stack Trainer's $3.99. Nibble also leads on in-app purchases (none vs 2) and update cadence (every 5 days vs every 3 months). Stack Trainer's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.4). On ads there is nothing between them.

Nibble 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. Nibble asks for nothing beyond the download.

Stack Trainer ships an update every 3 months, Nibble every 5 days. The most recent releases landed on August 28, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | Stack Trainer | Nibble |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Subscription | — |
| Size | 6 MB | 155 MB |
| Requires iOS | **15.6** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Ralph Cos](https://appshunter.io/developer/573505028) | [XO Pixels](https://appshunter.io/developer/1728523893) |

## 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 |


### Nibble

[App page](https://appshunter.io/ios/app/nibble-cravings-moderation/id6746082163)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stack Trainer free?

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

### Is Nibble free?

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

### Do Stack Trainer or Nibble have ads?

Neither Stack Trainer nor Nibble shows ads.

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

Stack Trainer ships an update every 3 months, and Nibble every 5 days. Most recently, Stack Trainer was updated on August 28, 2026 and Nibble on August 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*