GeoGebra Graphing Calculator vs I Cannot Speak
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GeoGebra Graphing Calculator
This application allows users to easily graph functions and equations, identify key points, and share their work. It's a powerful tool for learning math and science, offering features like regression and access to learning activities.
- Graph functions, polar and parametric curves
- Interactive transformations with sliders
- Find special function points (roots, min, max, intersections)
- Perform regression with best-fit lines
- Search for learning activities
- Save and share graphs
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Easily graph functions and equations, find special points of functions, save and share your results. Millions of people around the world use GeoGebra to learn math and science. Join us! • Plot functions, polar and parametric curves • Experience transformations with sliders • Get special points of functions: roots, min, max, intersections • Do regression with best-fit lines • Search for free learning activities directly from our app • Save and share your results with friends and teachers If you also want to solve equations or find derivatives and integrals, please try our CAS calculator app. We’d love to hear from you: send us your questions or feedback via Twitter @geogebra or via https://help.geogebra.org
I Cannot Speak
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Two taps to be understood. I Cannot Speak is for people who cannot rely on speech. Type or tap what you need to say, then hold your phone up so the person in front of you can read it — or let your phone say it out loud. No setup. No sign-up. No learning a system of symbols. SHOW IT, LARGE Write a sentence and put the keyboard away. The words grow to fill the screen, big enough to read across a counter, a hospital bed, or a noisy room. Turn the phone around and you have been understood. OR SPEAK IT One tap reads your sentence aloud in a natural voice. Choose the voice you want and how fast it speaks. It works with the ring switch off, so you are heard even on silent. READY FOR WHERE YOU ARE Six situations — restaurant, medical, travel, transport, shopping and emergency — each holding the phrases that place actually needs. Tap the situation, tap the phrase. Edit any of them, or build situations of your own for the places you go. THE THINGS A GESTURE CANNOT SAY A row of everyday icons along the bottom of the home screen: water, a restroom, a charger, a pharmacy, a taxi. One tap shows the icon large with the sentence underneath, ready to speak. MY CARD Your name, conditions, allergies, medications and emergency contacts on one card you can hold up without typing anything. Useful in a waiting room, at a pharmacy counter, or any moment when explaining is the hard part. ACROSS LANGUAGES Show the same sentence in another language, large and clear. Useful abroad, and useful at home when the person in front of you speaks a different one. HELP FINDING THE WORDS Rough notes become a complete sentence. Type "water please" and get "Could I have some water, please?" On iPhone 15 Pro and newer this runs on the device itself. Everywhere else it uses a private connection — and if there is no connection at all, I Cannot Speak falls back to built-in phrases so you are never left with nothing. PLAN A DAY Describe what your day looks like and I Cannot Speak suggests the phrases it will need, ready before you are standing there. BUILT TO BE TRUSTED Your saved phrases, your name and photo, and everything on My Card stay on your phone. What you send to be reworded or translated is not kept — not by us, and not by the company whose model does the work. No ads, no analytics, no tracking, nothing sold. WHO IT IS FOR People living with ALS, aphasia, a stroke, Parkinson's, autism, selective mutism, a laryngectomy, or a throat injury. People recovering from surgery. Anyone whose voice has gone quiet, for a week or for good. SUBSCRIPTION I Cannot Speak is $4.99 a month or $29.99 a year, and starts with a free trial. Every feature is included in both plans — there is no cut-down version. Cancel any time in Settings. Privacy policy: https://icannotspeak.vercel.app/privacy Support: https://icannotspeak.vercel.app/support
Screenshots
Verdict
The clearest difference is in-app purchases: GeoGebra Graphing Calculator at none against I Cannot Speak's 2. GeoGebra Graphing Calculator also leads on iOS requirement (16.0 vs 18.0). On price, update cadence, ads and device support 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. I Cannot Speak sells 2 in-app purchases, starting at $4.99 per month. GeoGebra Graphing Calculator asks for nothing beyond the download.
Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | GeoGebra Graphing Calculator | I Cannot Speak |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (284 ratings) — better | — |
| Positive reviews | 53.8% of reviews | — |
| Number of ratings | 284 — better | — |
| Update frequency | Monthly | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 104 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | GeoGebra GmbH | Sakib Shaikh |
Bugs and requests
GeoGebra Graphing Calculator
Reported bugs
16 issues- App crashes when entering complex equations
- Graphs disappear when touched or zoomed
- Functions deleted when app moves to background
- Exam mode locks device for 8 hours
- Cannot paste content on mobile version
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- Crashes with parametric variables
- Integral and Limit commands show 'unknown command' error
- Derivative function expression not displayed
- Crashes on iPad with Stage Manager enabled
- Cannot open saved GeoGebra files on iPad
- Crashes when entering fractions
- Performance issues with absolute value functions
- Crashes with certain trigonometric combinations
- Intersection points difficult to select on iPhone
- Zoom functionality causes crashes
- Help menu causes app to crash
Requested features
15 requests- Save and load functionality for projects
- User account login and cloud storage
- 3D graphing capabilities
- Fraction input support
- Radian mode for trigonometric functions
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- Integral and limit command functionality
- Derivative function expression display
- Parametric and polar coordinate graphing
- Handwriting recognition for input
- Dark mode theme
- Export to CSV or image formats
- Improved keyboard with preset functions
- Geometry construction tools restoration
- Support for imaginary numbers
- Auto-save feature
I Cannot Speak
Not enough reviews yet to summarise bugs or requests.
In-app purchases
GeoGebra Graphing Calculator
No in-app purchases
I Cannot Speak
- I Cannot Speak Pro Monthly14 Days trial$4.991 Month
- I Cannot Speak Pro Yearly14 Days trial$29.991 Year
Questions
Is GeoGebra Graphing Calculator free?
Is I Cannot Speak free?
Do GeoGebra Graphing Calculator or I Cannot Speak have ads?
Which is updated more often, GeoGebra Graphing Calculator or I Cannot Speak?
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