TD Talk vs Symbol Overlay Maker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TD Talk
This app enables communication for individuals unable to use their voice or hands. It offers text-to-speech functionality through eye-tracking or touch input, supporting a wide range of languages and voices for natural conversation.
- Eye-tracking communication
- Touch input for typing
- Customized predictive sentence construction
- In-sentence editing
- 35+ languages and voices
- Face-to-face conversation mode
- QuickMessages for common phrases
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TD Talk is a text to speech app that empowers people to talk using just their eyes or fingers. It’s designed for literate adults who cannot use their voice, their hands or both, including people with disabilities such as ALS/MND, multiple sclerosis, muscular dystrophy, cerebral palsy and locked-in syndrome. When used with TD Pilot, an iPad-based, eye tracking-enabled speech generating device by Tobii Dynavox, it unlocks the ability to: • talk using just your eyes via the world’s leading eye tracking technology • talk using just your fingers, by typing the words you want to speak • join any conversation with fast, customized, predictive sentence construction • correct typos with in-sentence editing using just your eyes • express yourself in 35+ languages and voices • have face-to-face conversations via the Partner Window on a TD Pilot device Join the conversation TD Talk empowers people to communicate who they are and what they want to say, in the most fluid way possible: Converse naturally • participate naturally in dialogue by displaying your typed text to your conversation partner in the rear-facing Partner Window on a TD Pilot device • select your language of choice and switch to it seamlessly Express yourself quickly • remain an active part of any conversation with the ability to use predicted text and to edit errors directly within a sentence • maintain a more natural speaking pace with QuickMessages, pre-programmed common and custom phrases such as ‘I need help’ and ‘wait please, I’m typing’ Sound like yourself • express yourself more fluidly thanks to phrase prediction, which learns and adapts to your personal communication style • choose from a selection of voices to find one you most identify with • Import a custom synthetic voice that mimics your natural one with voice banking from one of the following vendors: Acapela (my-own-voice), Model Talker, The Voice Keeper, ElevenLabs Using TD Talk without TD Pilot Some people may want to try TD Talk on an iPad without using TD Pilot, such as: • those with progressive degenerative conditions transitioning from touch to eye gaze access • clinicians who want to try TD Talk on behalf of their clients • hospitals and other institutions PLEASE NOTE, using TD Talk on an iPad without the TD Pilot device will mean: • touch access only (no eye tracking access) • a smaller selection of languages and voices For more information Visit: us.tobiidynavox.com/products/td-talk Customer support: us.tobiidynavox.com/pages/contact-us
Symbol Overlay Maker
Easily create printable symbol overlays for communication devices and switches. Supports core words, classroom activities, and home communication with a large symbol library.
- Create printable symbol overlays
- Supports speech devices and switches
- Includes SymbolStix symbol set
- Supports core words and activities
- Printable for home and classroom use
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The AbleNet Symbol Overlay app supports best outcomes by providing an easy way for therapists, teachers, and parents to quickly create printable symbol overlays for AbleNet speech devices and accessibility switches. Individuals benefit from the added context and support a symbol overlay provides. The AbleNet Symbol Overlay Maker app now includes the best-in-class SymbolStix symbol set with thousands of high-quality symbols. Create and print symbol overlays to support core words, activities in the classroom, and communication at home.
Verdict
The clearest difference is rating: TD Talk at 4.2 against Symbol Overlay Maker's 2.3. TD Talk also leads on update cadence (every 2 months vs every 6 months). Symbol Overlay Maker's advantage is iOS requirement (13.0 vs 17.2). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
TD Talk holds the better App Store score, 4.2 against 2.3. Both are backed by a comparable volume of ratings — 11 and 4 respectively.
TD Talk ships an update every 2 months, Symbol Overlay Maker every 6 months. Both last shipped on October 24, 2026.
| Parameter | TD Talk | Symbol Overlay Maker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (11 ratings) — better | 2.3 (4 ratings) |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 11 — better | 4 |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 17.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 305 MB | 142 MB |
| Age rating | 4+ | 4+ |
| Developer | Tobii Dynavox LLC | AbleNet |
Customer experience
TD Talk
Symbol Overlay Maker
In-app purchases
TD Talk
No in-app purchases
Symbol Overlay Maker
No in-app purchases
Questions
Is TD Talk free?
Is Symbol Overlay Maker free?
Which has better reviews, TD Talk or Symbol Overlay Maker?
Do TD Talk or Symbol Overlay Maker have ads?
Which is updated more often, TD Talk or Symbol Overlay Maker?
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