# Sono Flex > AAC symbol-to-speech app for nonverbal users, supporting literacy development. (iPhone/iPad app by Tobii Dynavox LLC.) - Source: https://appshunter.io/ios/app/sono-flex/id463697022 (this page in markdown: same URL + `.md`) - Developer: [Tobii Dynavox LLC](https://appshunter.io/developer/446210474) - Category: Education - Price: $99.99 - Rating: 4.30/5 from 14 App Store ratings · 22 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 308 MB - Languages: American English - Released: 2011-10-07 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/sono-flex/id463697022/reviews.md ## What is Sono Flex? Tobii Sono Flex is an easy to use AAC vocabulary app that turns symbols into clear speech. It offers language to nonverbal users who are not yet in full control of literacy. Sono Flex combines the benefits of structure and flexibility, providing a framework for language development, quickly matching individual and situational communication needs. Tobii Sono Flex has been designed to be easy to operate and easy for SLPs, teachers, parents, caregivers or other communication partners to setup and customize. --- Version and pricing --- Tobii Sono Flex is a universal application available for iPhone, iPod and iPad. Users need only to buy the application once to run it on either device. Tobii Sono Flex is also available in a slightly limited, but fully functioning evaluation version called Tobii Sono Flex Lite. Educational institutions are eligible for a 50% Educational Discounts through Apple’s Volume Licensing Program for Education when buying more than 20 licenses (currently only available in the USA). Please contact your local Tobii representative for more information. --- Some of the features of Tobii Sono Flex --- - Combines core and topic-based vocabulary in a unique and dynamic way - Provides an easy, and highly motivating, start with over 50 pre-made context vocabularies - Comes with more than 11,000 SymbolStix® symbols - Use the camera and photo albums of the iPhone or iPad to create your own symbols - Comes with 5 US English, high quality Acapela voices; one boy, one girl, two women and one male voice. - Offers a solid structure to build up a large common vocabulary and enables versatile communication - Great flexibility in tailoring the vocabulary to individual and situational needs - Develop within Tobii Sono Flex, into other Sono Suite products or even switch hardware platforms - Tobii Sono Flex is available for iPhone, iPod, iPad and on regular PCs and dedicated speech devices running Tobii Communicator. Read more on www.tobiisonoflex.com or www.tobii.com --- Read what others say about Sono Flex --- "Awesome, awesome, awesome! I wonder why it hasn’t been developed before. It is great to have the situational modules at hand so easily. This is just perfect for us to prepare sessions with clients with a minimum of time consumption. It is really nice that you have chosen very interactive and playful contexts that are age independent." Alycia Berg, MS, CCC-SLP, Boston Children’s Hospital "I have to say, I really like Sono Flex. I believe that the control that a user has over it is going to be very helpful and prove to be successful over other currently available products where one can just flip through screens without having access to a full communication system that supports interaction. I really love the Context-based pages. It is great that you include phrases in these as well for quick interactions that are specific to the context-based pages. Glad to see About Me as a context page. The way you can swap out context-based pages is really brilliant and helps to expand the communication opportunities without increasing the navigation demands." Judy Lariviere, M.Ed., OTR/L, Communication Specialist, Rett Clinic, Oakland Children’s Hospital "Looks good. I like the way the vocab is laid out and you can change one bottom bar it’s possibly the fastest way of changing vocab I have seen." Will Wade, Lead Occupational Therapist at Kent Communication and Assistive Technology Service, Researcher at Oxford Brookes University, Operator of Apps for AAC website "I love the vocabulary and the mix of core words and situations. What I like: Layout of pages; no vertical scroll; grammar feature; situations, situations, situations. Editing is very different, but once I got used to it I liked it (I like to see the whole page as a list, that is cool)." Kate Ahern, M.S.Ed., AT Specialist and Operator of ‘Teaching Learners with Multiple Special Needs’ Blog ## Key features - Symbol-to-speech conversion - Core and topic-based vocabulary - Over 11,000 SymbolStix symbols - Custom symbol creation from photos - High-quality Acapela voices - Context-based vocabulary modules ## Recent user reviews (10 of 22) All indexed reviews: https://appshunter.io/ios/app/sono-flex/id463697022/reviews.md ### 5/5 — Good, but... *2024-07-02* There's an AAC app called CoughDrop that recreated your whole menu. I never bought the app, because when I first saw it, the age was 17+. Then after lots of waiting, and AAC with Sono Flex, Proloquo2go, InnerVoice, ChatterBoards, and PixWriter, PixWriter is not an AAC app. So, I decided to make a lemonade stand to make money for LAMP Words for Life, which I will use to do a sight words filter. Wait! I said too much! I should really stop the text immediately. I will hit send in 5, 4, 3, 2, 1, it is done. ### 5/5 — AMAZING - but there’s no apostrophe *2022-10-28* Love the app. My son has been using for years now - mostly when we don’t have his communication device handy. The ONLY thing that bothers me is that he needs to use a comma ( , ) in place of an apostrophe ( ‘ ). I tried to add one manually but was unable. Do you think we can get this implemented? I’d greatly appreciate it. Best, Tracey ### 4/5 — Awesome AAC App! *2018-04-02* I’m an Autistic person who uses this app when under extreme stress. More importantly, I introduced the lite version to my cousin, who is nonspeaking, Autistic, and has intellectual disability, some months ago, and went ahead and purchased the full version because it’s that great. It’s very intuitive for both of us and through it, he has expressed things he’s never before been able to. The only complaint I have about this app is that editing pages is tedious and can rearrange things too much if you’re not careful, which impacts motor planning. Otherwise, I love Sono Flex and would recommend it for anyone who needs a relatively-inexpensive AAC solution. ### 3/5 — Needs some updating *2017-02-17* I like that I can have same content on the Tobii and and iPad. I wish there were the same symbols in both programs. I need to edit the boards to be the same as the Tobii and the first two symbols I edit, there aren't the symbols. I wanted magnetic letters and iPad. Ironic, that there is no symbol for iPad when I'm on an iPad! ### 5/5 — New update *2015-11-19* I want the new update for sono flex add more symbol and new voices ### 3/5 — Good, but... *2015-08-13* I like most things about this AAC app, including simplicity. However, there are a few things that keep it from being 4-5 stars. First...the voice! The choices are awful...artificial and robotic. The child choices are especially awkward, which surprises me knowing a majority of this app's users are children. Second, there is no way to change the positioning of the context buttons. This is not functional for individuals with limited fine motor control who need frequently used buttons near the bottom or sides. You are able to change position of the word buttons within a context, but only in top to bottom order. This is completely contrary to the written word and speech which flows left to right, not top to bottom. Please consider changing these two big items. Otherwise, not sure it is worth $100 as is. ### 4/5 — PLEASE SYNC between devices *2014-09-20* Great app! It would really be nice if you could sync between devices. My son has really learned a lot on this app, he has a ipod that is portable, however, we also have an iPad and my iPhone. I would like them all to synch in case depleted battery, broken device etc. I just want to make sure that communication that most people take for granted is there for him when he needs it Thanks again, I hope to see the update soon ### 3/5 — Voices *2014-02-26* I'm an AAC expert, because I HAVE to be. Cannot figure out how to change the irritating voice it comes with. Could give a higherrating for quickfires if I could. Help. ### 5/5 — Julie Vesely *2013-05-12* Hi to the makers of this App, it would be nice if you make an update and you have the option to change the pitch of the voice, also have a much slower option when you scroll from page to page ### 5/5 — Ms *2012-05-08* Excellent augmentative communication app. My only criticism is that it is difficult to edit and customize pages. It would be really nice if items on each page could be easily added, deleted or moved right on the page instead of going to a different menu and editing. Touching the icon and being able to move it around the page would be an awesome addition. The students I have used this app with like it. June ## Frequently asked questions about Sono Flex ### What is Sono Flex used for? Sono Flex is an Augmentative and Alternative Communication (AAC) app designed to help nonverbal individuals develop language and communicate by turning symbols into speech. It's particularly useful for those not yet fully in control of literacy. ### What devices is Sono Flex available on? Sono Flex is a universal app compatible with iPhone, iPod, and iPad. A single purchase allows it to run on any of these Apple devices. ### How much does Sono Flex cost? The full version of Sono Flex is priced at $99.99. There is also a limited, fully functioning evaluation version called Sono Flex Lite available. ### Does Sono Flex offer educational discounts? Yes, educational institutions in the USA can receive a 50% discount on Sono Flex when purchasing over 20 licenses through Apple’s Volume Licensing Program for Education. ### What kind of voices does Sono Flex include? Sono Flex comes with 5 high-quality Acapela voices in US English, including one boy, one girl, two women, and one male voice, to provide clear speech output. ### How often is Sono Flex updated? The latest version of Sono Flex is 2.0.0, which was last updated on March 8, 2018. Users can expect ongoing development and improvements to the application. ### Can I create my own symbols in Sono Flex? Yes, Sono Flex allows you to use your iPhone or iPad's camera and photo albums to create your own custom symbols, adding a personalized touch to communication. ### What is the age rating for Sono Flex? Sono Flex has an age rating of 4+, making it suitable for a wide range of users, including children and adults who can benefit from its communication support features. ## Version history (last 5 releases) ### 2.0.0 — 2018-03-08 This app has been updated by Apple to display the Apple Watch app icon. Added iOS 11 compatibility. ### 1.1.6 — 2014-12-10 Resolved issue with voice configuration for certain users ### 1.1.5 — 2014-12-06 Added support for iOS version 8 ### 1.1.4 — 2013-09-23 Added support for iOS version 7 ### 1.1.3 — 2012-10-11 Critical issue correction that affects all users who have updated to iOS 6: When editing vocabulary items, the app would crash frequently. This has now been fixed. ## More apps by Tobii Dynavox LLC - [Sono Flex Lite](https://appshunter.io/ios/app/sono-flex-lite/id463709444) - [Sono Flex Lite SWE](https://appshunter.io/ios/app/sono-flex-lite-swe/id537246932) - [Sono Flex Lite BP](https://appshunter.io/ios/app/sono-flex-lite-bp/id562582441) - [Boardmaker Student Center](https://appshunter.io/ios/app/boardmaker-student-center/id932948346) - [Accessible Literacy Learning](https://appshunter.io/ios/app/accessible-literacy-learning/id983666508) All apps by Tobii Dynavox LLC: https://appshunter.io/developer/446210474 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*