Comparison

ChatterPix Kids vs Speech2Math Calculator

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

Head to head
About

ChatterPix Kids

Transform photos into animated talking characters for fun messages, greetings, and creative projects. This app is designed for children aged 5-12 to express themselves through interactive visuals.

Highlights
  • Animate photos to talk
  • Create silly greetings
  • Make playful messages
  • Design creative cards
  • Add stickers, frames, and filters
Read full description

Create ChatterPix with friends and family as silly greetings, playful messages, creative cards, or even fancy book reports. And best of all, it’s FREE! AGES: 5-12. NOTE: For adults, check out our “ChatterPix” app for more fun and sharing via email and social media. CATEGORY: Creative Expression TOOLS: 22 stickers, 10 frames and 11 photo filters ABOUT DUCK DUCK MOOSE (A subsidiary of Khan Academy) Duck Duck Moose, an award-winning creator of educational mobile apps for families, is a passionate team of engineers, artists, designers, and educators. Founded in 2008, the company has created 21 top-selling titles and has received 21 Parents’ Choice Awards, 18 Children’s Technology Review Awards, 12 Tech with Kids’ Best Pick App Awards, and a KAPi award for “Best Children’s App” at the International Consumer Electronics Show. Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. Duck Duck Moose is now part of the Khan Academy family. Like all Khan Academy offerings, all Duck Duck Moose apps are now 100% free, without ads or subscriptions. For kids ages 2-6, don't miss Khan Academy Kids, our new early learning app to help young children with reading, writing, math and social-emotional development! We’d love to hear from you! Visit us at www.duckduckmoose.com or drop us a line at support@duckduckmoose.com.

About

Speech2Math Calculator

This app converts spoken mathematical commands into expressions for calculation. It offers a wide range of operations and supports numerous languages for voice input. An on-screen keyboard allows for manual editing of expressions.

Highlights
  • Speech to math expression conversion
  • On-screen keyboard for editing
  • Basic and scientific calculator functions
  • Multi-language voice input support
  • Trigonometric and logarithmic functions (PRO)
  • Text-to-speech (TTS) support
Features
Read full description

Speech2Math Calculator translates your speech into mathematical expressions. Speech2Math Calculator is a useful talking voice calculator application, which allows you to calculate easily by speaking. Speech2Math Calculator also has an on-screen keyboard that allows you to edit expressions. Plus, minus, times, divide operations, square, cube square root, power, and factorial operations are available. Scientific calculator features are available. You can select the input speech-language independent from your default device locale and language. Speech to Math Calculator is the only voice calculator which supports all the following languages and TTS (text to speech). Trigonometric functions such as sinus, cosine, tangent, arcsines, arccosine, arctangent, and logarithmic functions are available in the PRO version. Supported Languages: English, French, Spanish, Italian, Arabic, Bulgarian, Catalan, Danish, Greek, Estonian, Persian chandani, Finnish, Hebrew, Hindi, Hungarian, Indonesian, Japanese, Haitian, Korean, Lithuanian, Latvian, malay, Norwegian, Polish, Portuguese, Romanian, Danish, Russian, Slovak, Slovenian, Thai, Turkish, Ukrainian, Urdu, Vietnamese, Chinese.

Screenshots

ChatterPix Kids4 screens
Speech2Math Calculator3 screens

Verdict

The call

The clearest difference is review sentiment: ChatterPix Kids at 72% against Speech2Math Calculator's 0%. ChatterPix Kids also leads on rating (4.3 vs 2.3) and in-app purchases (none vs 1). On price, ads, device support 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. Speech2Math Calculator sells 1 one-off in-app purchase. ChatterPix Kids asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ChatterPix Kids holds the better App Store score, 4.3 against 2.3. That said, the two scores are not equally well evidenced: ChatterPix Kids has 664 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 72% of ChatterPix Kids's written reviews are positive against 0% of Speech2Math Calculator's.

UpkeepUpdate frequency

ChatterPix Kids ships an update every 2 months, Speech2Math Calculator every 4 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard6 real differences · 4 level
ChatterPix Kids versus Speech2Math Calculator: the parameters behind the verdict, then further details
ParameterChatterPix KidsSpeech2Math Calculator
PriceFreeFree
Rating4.3 (664 ratings) — better2.3 (3 ratings)
Positive reviews72.1% of reviews — better0.0% of reviews
Number of ratings664 — better3
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better10.0
Further details — not scored
Size75 MB89 MB
Age rating4+4+
DeveloperDuck Duck Moose LLCAudiosdroid OU

Customer experience

ChatterPix Kids

All ratings662 ratings
Positive80.1%
Neutral5.6%
Negative14.4%
Written reviews208 reviews
Positive72.1%
Neutral8.7%
Negative19.2%

Speech2Math Calculator

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

ChatterPix Kids

Reported bugs

3 issues
  • Camera not working for some users
  • Repeated crashes or freezes
  • Syncing issues between photos and audio

Requested features

4 requests
  • Ability to adjust mouth movement and animation
  • More customization options
  • Longer recording time
  • Integration with more photo/video platforms

Speech2Math Calculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ChatterPix Kids

No in-app purchases

1 purchases

Speech2Math Calculator

One-time1
  • Speech2Math Calculator PRO$0.99

Questions

Is ChatterPix Kids free?
ChatterPix Kids is free to download, with no in-app purchases.
Is Speech2Math Calculator free?
Speech2Math Calculator is free to download, with in-app purchases available.
Which has better reviews, ChatterPix Kids or Speech2Math Calculator?
ChatterPix Kids is rated higher. ChatterPix Kids averages 4.3 out of 5 from 664 ratings, while Speech2Math Calculator averages 2.3 from 3 ratings.
Do ChatterPix Kids or Speech2Math Calculator have ads?
Neither ChatterPix Kids nor Speech2Math Calculator shows ads.
Which is updated more often, ChatterPix Kids or Speech2Math Calculator?
ChatterPix Kids ships an update every 2 months, and Speech2Math Calculator every 4 months. Most recently, ChatterPix Kids was updated on November 1, 2026 and Speech2Math Calculator on November 2, 2026.

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