Eye Type AAC vs Prism
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Eye Type AAC
This app enables communication through eye or head tracking on iOS devices. It offers a simple, free interface for text-to-speech output, designed for individuals with motor impairments.
- Eye tracking and head tracking
- Text-to-speech output
- Large, high-contrast buttons
- Word prediction
- Simple interface
- Works on iPhone and iPad
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Eye Type AAC is the fastest way to type and speak using eye tracking or head tracking on your iPhone or iPad. Completely free, with no subscriptions, no in-app purchases, and no ads. Ever. Four large buttons. Tap a sequence to type any letter. Your words are spoken aloud instantly. No complicated menus, no setup. Just open the app and start communicating. WHO IT'S FOR Eye Type was designed for people with motor difficulties caused by apraxia, ALS, cerebral palsy, stroke, multiple sclerosis, spinal cord injury, locked-in syndrome, or other conditions that make traditional keyboards difficult or impossible to use. FEATURES • Completely free with no subscriptions, in-app purchases, or ads • Eye tracking and head tracking built in, no extra hardware needed • Works on iPhone and iPad using the front-facing camera • Large, high-contrast buttons designed for reliable access • Word prediction for faster communication • Text-to-speech output • Simple, distraction-free interface Built by the team behind Visual Choices AAC.
Prism
This communication app provides on-device AI and supports 12 languages, offering a private and accessible way for nonverbal users to express themselves. It functions fully offline and can be controlled from an Apple Watch, making communication possible anywhere, anytime.
- On-device AI
- Apple Watch support
- 12 languages
- Offline functionality
- Customizable vocabulary
- No subscriptions or ads
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Prism AAC helps nonverbal children and adults talk. Tap pictures, build sentences, and hear them spoken aloud — in 25 languages, on iPhone, iPad and Apple Watch. Core communication is free and works without an account or an internet connection: communication boards with 22 categories, a keyboard with word prediction, saved phrases, device voices and cached speech, on-device AI, visual schedules, therapeutic games and emergency communication. No ads. No data harvesting. Your child's voice never depends on WiFi. PRISM AAC CLOUD — optional subscription US$4.99 per month adds a monthly allowance of 50,000 newly generated natural-voice speech characters and 100 cloud AI requests. Cached playback and device voices never use the allowance. The allowance resets on the first day of each month (00:00 UTC), and there are no overage charges. The same subscription works on iOS and on the web with one account. Boards, saved phrases, cached speech, device voices, on-device AI and emergency communication stay available without a subscription and after one ends. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically each month unless it is cancelled at least 24 hours before the end of the current period, and it can be managed or cancelled in your Apple Account settings after purchase. WHY PRISM AAC - Privacy first: on-device AI keeps your words on your device - Works offline: boards, saved phrases and cached speech need no connection - Apple Watch: communicate directly from your wrist - 25 languages, including Simplified, Traditional and Hong Kong Chinese - Customizable vocabulary, grid size, themes and motor accommodations - Hands-free input: head tracking, switch scanning, gestures and voice - Caregiver tools: schedules, notes, insights and a caregiver PIN Terms of Use: https://synalux.ai/terms Privacy Policy: https://synalux.ai/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Prism at none against Eye Type AAC's 2. Prism also leads on update cadence (every 3 days vs every 11 months). On price, rating, ratings volume and ads 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
Both are free to download. Eye Type AAC sells 2 one-off in-app purchases. Prism asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Eye Type AAC against 5.0 for Prism. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
Eye Type AAC ships an update every 11 months, Prism every 3 days. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.
| Parameter | Eye Type AAC | Prism |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 11 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 14 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Su-Kam Intelligent Education Systems Inc | Synalux LLC |
Customer experience
Eye Type AAC
Prism
In-app purchases
Eye Type AAC
- 7-day free trialFree
- Activate forever$19.99
Prism
No in-app purchases









