Comparison

calmspeak vs Prism

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

Head to head
About

calmspeak

Features
Read full description

CalmSpeak is a simple, predictable communication app designed to support non-verbal individuals through visual expression. Built for real-world use by families, therapists, and caregivers, CalmSpeak provides structured communication without complexity, subscriptions, or cloud dependence. Core Communication Users can build sentences by selecting clear visual tiles such as: • I want • I need • Help • Stop • Yes / No / Wait This allows communication to happen quickly, without requiring typing or speech. Visual Schedules Create predictable daily routines using visual task sequences. Helpful for: • Morning / bedtime routines • Therapy preparation • Reducing anxiety through structure Feelings & Emotional Expression Simple emotional check-ins help users express how they feel when words are difficult. Regulation Support Built-in calming tools assist during moments of overwhelm with guided breathing and visual focus exercises. Social Stories Prepare for real-life situations using visual story flows that explain what will happen next. Designed for Privacy and Reliability CalmSpeak works entirely offline. • No accounts • No subscriptions • No tracking • No internet required Your data stays on your device. Built for Caregivers Too Includes caregiver tools such as: • PIN-protected settings • Routine customization • Printable communication summaries CalmSpeak is not designed to replace therapy — it is designed to support communication when it matters most.

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

calmspeak4 screens
Prism4 screens

Verdict

The call

The clearest difference is device support: Prism at 3 against calmspeak's 1. On price, ads, in-app purchases and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 8 level
calmspeak versus Prism: the parameters behind the verdict, then further details
ParametercalmspeakPrism
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequency—Every 2 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.616.0 — better
Further details — not scored
Size24 MB13 MB
Age rating4+4+
DeveloperSasa MilatSynalux LLC

In-app purchases

None

calmspeak

No in-app purchases

None

Prism

No in-app purchases

Questions

Is calmspeak free?
calmspeak is free to download, with no in-app purchases.
Is Prism free?
Prism is free to download, with no in-app purchases.
Do calmspeak or Prism have ads?
Neither calmspeak nor Prism shows ads.

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