Stack Trainer vs SubVox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stack Trainer
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.
- Realistic card deck simulation
- Multiple mnemonic training approaches
- Customizable stack filters
- Lorrayne's peg words integration
- Interactive quick-touch analyzer
- Display and whisper modes
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Stack Trainer forms part of a comprehensive suite of apps that dedicate to technical learning tools for Close-up magicians. Stack Trainer addresses those who are familiar with the concepts related to Aronson, Tamariz, Nikolas. If you know what these names relate to, and you apply the according techniques, then this app will help you stay tuned and inspired. Stack Trainer provides a most realistic card deck experience. It sets the golden standard for mnemonic deck training. A radical slim design. Cycle through the logical phases of the challenges at hand. Name it the "virtual spectator" concept. Approaches: - Next Card: Sequentially displayed, name the next card - Each Card: Name each card's position in a shuffled stack - Each Position: Name each position's card in a shuffled stack - Get Position: Name the position of a given card - Get Card: Name the card at a given position - Next Suit: Name the distance to the next of the same suit - Wrong Card: Identify the one card that is displaced in the face-up spread stack - Missing Card: Find the missing card in the face-up spread stack - Spot: Spot a specific card in the face-up spread stack - Highest Card: Identify the high and low cards of a random sub-stack - Four of a Kind: Name the distance to the next of the same kind Filters: Filters can be set to reduce the actual stack to a substack of lower size addressing and supporting the gradual progress during the early learning phase of a stack. Filters also provide different perspectives onto a stack to inspire and engage expert users. These filters, applied to the chosen approach, can be set: - ranges 1-13, 14-26, 27-39, 40-52, and a custom range - pair and impair positions - red and black cards - any of the four suits - court and number cards Some Features: - Aronson, Tamariz and user defined stacks - Lorrayne's peg words for the 52 cards and 52 positions, plus 3 user defined sets - display and whisper modes - includes the quick-touch interactive analyser visualising the solution path and allowing for self imposed problem statements with decadic and tridecadic layouts - feedback driven development - feels almost like a true deck of cards. Practicing card magic you don't want no complicated, overloaded and distracting user interface. Less is more. - probably the most complete, and straightforward solution available. A card, the one downwards (or upwards), maybe its mates, maybe the next one of the same suit. Either on random walk, or deliberate choices on the complete map. Touch swipe, swipe. Swipe and again. To experience the look and feel of 'Stack Trainer' load the free 'Random Input' app available by this developer. Additional information: - License agreement - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy policy - https://yeahgic.com/pge_PrivacyStack.htm
SubVox
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.
- Voice-triggered context extraction
- Custom start and stop phrases
- On-device speech processing
- Optional conversational AI
- Background mode
- Third-party integrations
- watchOS companion app
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SubVox is a voice-activated content extraction tool with optional conversational AI features, designed for creators, performers, productivity users, and anyone who needs fast, hands-free action triggers. Speak your start and stop trigger phrases, and SubVox interprets the intent — then sends it to the third-party app or integration you choose. All audio and speech recognition is performed locally on your device by default. You may optionally choose to turn on Cloud Speech AI, which additionally can use AI provider cloud models for speech to text. SubVox does not store, track, or collect audio, transcripts, or extracted text. Features • Voice-triggered context extraction • Custom start and stop phrases • On-device speech processing • Optional conversational AI using user-provided AI provider credentials • Optional background mode when the screen is off • Third-party integrations including MysterSmith, Inject, and more • watchOS companion app • Secure storage of integration and AI credentials in Keychain Privacy First SubVox does not store audio, transcripts, or extracted text. If you choose to enable conversational AI, text is sent directly from your device to the AI provider you select using your own credentials. SubVox does not receive, store, or process this data on its own servers. Your data only leaves your device when you explicitly choose to send it and only to services you authorize. For Entertainment & Personal Utility SubVox is intended for entertainment and personal utility. It is not designed for professional, legal, medical, or safety-critical use.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Stack Trainer | SubVox |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 6 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Ralph Cos | Christopher Canfield |
Customer experience
Stack Trainer
SubVox
In-app purchases
Stack Trainer
- 3 Months Subscription7 Days trial$1.993 Months
- Annual Subscription$2.991 Year
SubVox
No in-app purchases









