TumbleBooks vs World Class TKD Chicago
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.
World Class TKD Chicago
This app provides access to martial arts curriculum, class schedules, and upcoming events for a leading Tae Kwon Do provider. Users can study Korean terms, connect with the school, and share their TKD journey with others.
- View curriculum manuals and videos
- Check class schedules
- See upcoming events
- Study Korean terms with audio
- Contact the school
- Share with friends and family
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Welcome to the official mobile app of World Class Tae Kwon Do, the leading martial arts provider in Naperville and Aurora for kids, adults and families! World Class Tae Kwon Do is nationally recognized as one of the premier martial arts schools in the country. Download and use our app to: - View curriculum manuals & videos - See our class schedule - Check upcoming events - Study with Korean terms audio - Share TKD with friends and family - Contact us - And much more!
Screenshots
Verdict
The clearest difference is rating: World Class TKD Chicago at 5.0 against TumbleBooks's 3.8. TumbleBooks's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 18 months). On price, ratings volume, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
World Class TKD Chicago holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 21 and 8 respectively.
TumbleBooks ships an update every 2 weeks, World Class TKD Chicago every 18 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | TumbleBooks | World Class TKD Chicago |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (21 ratings) | 5.0 (8 ratings) — better |
| Positive reviews | 18.3% of reviews | — |
| Number of ratings | 21 — better | 8 |
| Update frequency | Every 2 weeks — better | Every 18 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 44 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | TumbleBooks Inc. | World Class Tae Kwon Do Centers, Inc. |
Customer experience
TumbleBooks
World Class TKD Chicago
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
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- 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
World Class TKD Chicago
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TumbleBooks
No in-app purchases
World Class TKD Chicago
No in-app purchases
Questions
Is TumbleBooks free?
Is World Class TKD Chicago free?
Which has better reviews, TumbleBooks or World Class TKD Chicago?
Do TumbleBooks or World Class TKD Chicago have ads?
Which is updated more often, TumbleBooks or World Class TKD Chicago?
Other comparisons
