# Stack Trainer vs SubVox

The clearest difference is review sentiment: SubVox at 100% against Stack Trainer's 0%. SubVox also leads on price (Free vs $3.99) and rating (5.0 vs 1.0). Stack Trainer's advantage is iOS requirement (15.6 vs 18.0). On ratings volume, ads and device support there is nothing between them.

SubVox 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. SubVox asks for nothing beyond the download.

SubVox holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 0% of Stack Trainer's written reviews are positive against 100% of SubVox's.

Stack Trainer ships an update every 3 months, SubVox every 2 weeks. Both last shipped on September 20, 2026.

## The numbers

| Metric | Stack Trainer | SubVox |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/stack-trainer/id646458442/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/subvox/id6756152870/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 6 MB | 59 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Ralph Cos](https://appshunter.io/developer/573505028) | [Christopher Canfield](https://appshunter.io/developer/1858743373) |

## 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 |


### SubVox

[App page](https://appshunter.io/ios/app/subvox/id6756152870)

This tool allows for hands-free content extraction and action triggering using voice commands. It processes audio locally by default, with optional cloud AI integration. Privacy is a core focus, with no storage or collection of user audio or text data.

**Highlights:** Voice-triggered context extraction, Custom start and stop phrases, On-device speech processing, Optional conversational AI, Background mode, Third-party integrations, watchOS companion app

**Features:** macOS Compatibility, Apple Watch app, 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 SubVox free?

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

### Which has better reviews, Stack Trainer or SubVox?

SubVox is rated higher. Stack Trainer averages 1.0 out of 5 from 1 ratings, while SubVox averages 5.0 from 1 ratings.

### Do Stack Trainer or SubVox have ads?

Neither Stack Trainer nor SubVox shows ads.

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

Stack Trainer ships an update every 3 months, and SubVox every 2 weeks. Most recently, Stack Trainer was updated on September 20, 2026 and SubVox on September 20, 2026.

---

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