TumbleBooks vs Mathletix Addition
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TumbleBooks
This app provides access to a digital library of children's books, offering a safe and contained reading environment. It simplifies access for multiple users with a single sign-on and is available to all subscribers.
- Access TumbleBookLibrary subscription
- Single sign-on for multiple devices
- Self-contained reading environment
- Easy installation and use
- Offline access (implied by single sign-on for months)
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Access your school or library's TumbleBookLibrary subscription from your iPhone, iPad, or iPod touch with the new TumbleBooksToGo app! TumbleBookLibrary subscribers can download and install the app on all of their devices! They'll be signed in for months with a single sign-on per device! All you need is a device and an internet connection. No more time wasted in helping a whole class of four-year-olds signs in! Now everyone can access it with a single tap! No more worry that your kids might navigate away from TumbleBookLibrary in the open internet browser! The TumbleBookLibrary app works like our mobile site and is entirely self-contained. It's simple to install, simple to use, and available to all subscribers! Please get in touch with your school/library for a username/password.
Mathletix Addition
This app makes learning addition enjoyable for children through engaging, short games. It focuses on repetition and positive reinforcement, inspired by classroom methods, to build math fluency and confidence without pressure.
- Short, fun game sessions
- Repetitive learning through games
- Positive feedback system
- Progress tracking for parents
- Focus on addition fluency
- No personal data collection
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Finally, a kids app that doesn’t ask you for any personal data! No ads. No in-app purchase requirements. No emails. Just fun math! Yes, math can be fun. Mathletix is designed to make learning the fundamentals of addition fun! We focus on short, session fun games that teach through repetition. We offer several different types of games to keep things fresh and fun all the while reinforcing number concepts through frequency and repetition. Mathletix is inspired by real classroom work and practice tests. We remove the pressure and pack the games with positive feedback. Players develop fluency in Addition, by using a system that increases the frequency of more challenging equations, and best of all the only competitions is their own best effort. "When learning is self-motivated by a need to know about something or, in this case by fun, it just works better" ~ Curt Becker Ph.D.,Cognitive Psychology Mathletix has an easy info tool that allows parents to quickly see which math facts are challenging their little ones, so you too can jump in to help. Mathletix games are easy to operate, fun to play, and will help your Mathlete build confidence and speed on their way towards math mastery!
Screenshots
Verdict
The clearest difference is review sentiment: Mathletix Addition at 100% against TumbleBooks's 18%. Mathletix Addition also leads on rating (5.0 vs 3.8). TumbleBooks's advantage is price (Free vs $9.99) and update cadence (every 2 weeks vs every 3 months). On ads, in-app purchases, 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
TumbleBooks is free to download; Mathletix Addition costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mathletix Addition holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: TumbleBooks has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 18% of TumbleBooks's written reviews are positive against 100% of Mathletix Addition's.
TumbleBooks ships an update every 2 weeks, Mathletix Addition every 3 months. The most recent releases landed on October 21, 2026 and July 3, 2026 respectively.
| Parameter | TumbleBooks | Mathletix Addition |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 3.8 (21 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 18.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 21 — better | 4 |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 44 MB | 127 MB |
| Age rating | 4+ | 4+ |
| Developer | TumbleBooks Inc. | Player1games Inc. |
Customer experience
TumbleBooks
Mathletix Addition
Bugs and requests
TumbleBooks
Reported bugs
163 issues- Unable to login with library card
- Login problem
- Did not let me sign in
- It does not work
- Tumble Mobile Is Broken
Show 158 moreShow fewer
- Can’t login
- App won’t accept username/password
- Just no
- Library list does not appear
- Can’t login!!
- Logging in please wait and it never really logged in
- Thanks for the meltdown
- Basically nothing worked
- You can’t read the full book
- Hard to get in
- Only read 1 page then it said thank you
- Issues trying to log on
- Crashes all the time
- Wont even open now
- Not letting me start the video or zoom in
- Who puts out crap like this
- Can’t get in
- Tarable
- Kicked me out
- Baaaaaaaaaaad
- Just no
- Nothing loads
- Page just stays blank
- Books never load
- Logging in is bugged
- Ceps on glitching me to da homescreen
- Can’t log in!!!
- Doesn’t have the List of Libraries to select from
- Gives me an error message
- Ceps crashing
- It’s the WORST
- Login failure
- App consistently fails to login
- It worked at one point and never worked again
- Not working app
- The books don’t load
- Not downloading!
- Can’t login
- It freezes
- Website and app don’t work on iPad
- Books won’t load
- Can’t get passed the login
- Keep getting an error
- App fails to deliver
- Cannot get into the app
- Kicked me back to my home screen
- Clunky
- Typing is so teeny
- Doesn’t seem like it was developed to work on phones
- Hard to navigate
- Difficult to get back to the homepage
- Can’t login!!
- No way to enter my library name
- Terrible for iPad
- Failed to log in
- Doesn’t work
- Unable to log in- app is worthless
- Every time I would turn it on it would not work
- Can’t even open app
- Hangs up all the time
- Does not work, at all
- I NEVER CAN LOGIN
- AWFUL DONT GET
- Shuts Down
- As soon as I open the app it shuts down
- Flickers
- Goes dark
- Back to my home screen
- Unable to login
- Can’t use it
- Doesn’t show Charlotte Mecklenburg library in the drop down
- Login screen itself does not work
- Worked 3min then nonresponding
- Crashed every time
- Not able to remember the login
- Error message for login
- App is great...when it lets you log in
- Cool
- Can’t sign in to read
- Can you fix it ?
- lol
- Can’t play videos any more
- No longer can read
- App gets hung up
- Never plays
- Cannot log on
- Constantly crashing
- Can’t log in
- Login simply fails every time
- Can’t login
- Barcodes squares to scan to login but no where is that an option
- How do I login ?
- Error couldn't sign in
- Never able to sign in
- Kept getting an error
- Hi
- Username baythorn and the password is Books
- Unable to login. Error message
- Can’t log in, tried two different library cards
- App just crashes now
- See the splash screen and then the app crashes
- Horrible
- Huge mistake
- You have to have your school or library subscribe to it
- Can’t get in
- Cannot log in
- With my library card number!
- Several others have had the same issue
- Please fix it!
- Doesn’t work!
- Will not let me log in
- After I select my library and enter library barcode!
- Very very frustrating!
- The app keeps logging out
- Can’t put in Library name
- Unable to pull up the list of libraries
- Unable to login
- Keeps giving me an error
- Log in error
- Can’t log in!
- Keeps saying log in error
- Very annoying!
- Can’t login
- List will not pop up for entering the library
- Therefore I cannot login
- Unable to log in
- Selected my library and entered my library card
- Can’t log in
- Why???!!!
- Awful
- Unable to login
- Unable to select local library
- Unable to read books
- Crashing at log in
- Worked great for a while
- Now it's crashing when trying to log in
- Ridiculously Inept
- Takes so long to download
- Doesn't work
- Doesn't accept login
- Needs work
- Doesn't accept my login even though it works fine in a web browser
- Please fix it
- Can't log in
- Family
- Great when it works
- Can no longer login since June bug fix!
- Doesn't work
- Trying to login but keep having error msg !
- Doesn't work
- Won't recognize my password
- Needs lots work
- Issue flipping pages
- Going to the next page
- Couldn't get to the next page
- No next page arrow or button
- Disappointing
- Please fix it quickly
Requested features
7 requests- Offline reading feature
- Filter for age-appropriate books
- Adjustable speed for audio read-alongs
- Option to not require sign-in
- Improve usability
Show 2 moreShow fewer
- Order books by grade level
- Fix page flipping and navigation
Mathletix Addition
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TumbleBooks
No in-app purchases
Mathletix Addition
No in-app purchases
Questions
Is TumbleBooks free?
Is Mathletix Addition free?
Which has better reviews, TumbleBooks or Mathletix Addition?
Do TumbleBooks or Mathletix Addition have ads?
Which is updated more often, TumbleBooks or Mathletix Addition?
Other comparisons
