Comparison

Eye Type AAC vs Prism

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Eye tracking and head tracking
  • Text-to-speech output
  • Large, high-contrast buttons
  • Word prediction
  • Simple interface
  • Works on iPhone and iPad
Features
Read full description

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.

About

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.

Highlights
  • On-device AI
  • Apple Watch support
  • 12 languages
  • Offline functionality
  • Customizable vocabulary
  • No subscriptions or ads
Features
Read full description

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

Eye Type AAC2 screens
Prism4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Eye Type AAC sells 2 one-off in-app purchases. Prism asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
Eye Type AAC versus Prism: the parameters behind the verdict, then further details
ParameterEye Type AACPrism
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 11 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better16.0
Further details — not scored
Size14 MB13 MB
Age rating4+4+
DeveloperSu-Kam Intelligent Education Systems IncSynalux LLC

Customer experience

Eye Type AAC

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Prism

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Eye Type AAC

One-time2
  • 7-day free trialFree
  • Activate forever$19.99
None

Prism

No in-app purchases

Questions

Is Eye Type AAC free?
Eye Type AAC is free to download, with in-app purchases available.
Is Prism free?
Prism is free to download, with no in-app purchases.
Which has better reviews, Eye Type AAC or Prism?
Eye Type AAC and Prism are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Eye Type AAC or Prism have ads?
Neither Eye Type AAC nor Prism shows ads.
Which is updated more often, Eye Type AAC or Prism?
Eye Type AAC ships an update every 11 months, and Prism every 3 days. Most recently, Eye Type AAC was updated on October 15, 2026 and Prism on October 2, 2026.

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