Comparison

CB1 Blockly vs TT Pre

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

Head to head
About

CB1 Blockly

This app enables users to program robots built with a specific engineering kit. It uses a visual, drag-and-drop interface to create commands that control motors, lights, and sounds based on sensor input.

Highlights
  • Visual programming with drag-and-drop blocks
  • Control motors, LEDs, and buzzer
  • Utilize various sensor inputs
  • Bluetooth connectivity to robots
  • Save up to 20 custom programs
  • Includes 10 preloaded demo programs
Features
Read full description

CB1 Blockly Programming App for Robotics Workshop For use with the engineering kit “Robotics Workshop” by Thames & Kosmos CB1 Blockly is a visual programming app based on Blockly. It allows you to write programs to control the robots you build with the Robotics Workshop kit. You can write visual programs with drag-and-drop code blocks in the app and then send the programs to the CB1 core controller on your robot models to make the motors turn, the buzzer sound, and the LEDs flash. You can write programs that use sensor input from the light sensor, sound sensor, distance (ultrasonic) sensor, and touch sensors to command your robots to interact with their environments. App Features • Connect to your models via Bluetooth connection. • Programming mode lets you script and save up to 20 programs. • Ten demo programs are preloaded to work specifically with the ten robot models in the kit. • A simple, visual programming language lets you use input data from two touch sensors, distance (ultrasonic) sensor, light sensor, sound sensor, and variable resistor knob to control four motors, 2 LEDs, and speaker. • Use the 64-page, step-by-step illustrated manual included in the kit to learn how to build the models and write the programs.

About

TT Pre

This app provides interactive math lessons and practice problems for pre-algebra students. It offers audiovisual lectures, automated grading, and detailed explanations for every problem, allowing for independent learning and progress tracking. The app can be used offline for a limited number of lessons, making it ideal for on-the-go learning.

Highlights
  • 139 audiovisual lectures
  • Thousands of practice problems
  • Automated grading and instant feedback
  • Step-by-step audiovisual explanations
  • Parental progress tracking
  • Digitized textbook with search
Read full description

The Teaching Textbooks Pre-Algebra app makes your TT course even better! Not only will your student enjoy math while learning independently, but, with the app, that learning can also take place on the go. Even when offline! Specifically, the app can be used offline for up to 6 lessons at a time. That makes it perfect for homeschool parents who need their kids to stay productive while the family is out and about during the day. The app’s other features include… • 139 audiovisual lectures that teach every core concept in the standard 8th grade curriculum • thousands of problems that give students all the practice they need to master each concept • automated grading and instant feedback for every single problem • step-by-step audiovisual explanations to every single problem so students can see exactly what they did wrong when mistakes are made (This makes the program feel as if a tutor is at the student’s side!) • parental controls that let you track your student’s progress • the digitized version of the printed Teaching Textbooks Pre-Algebra textbook (with a search feature and a hyper-linked index) • no advertising or in-app purchase offers • Internet connectivity is required, but you can remain offline for up to 6 lessons.

Screenshots

TT Pre4 screens

Verdict

The call

CB1 Blockly and TT Pre both sit at 3.3 stars, but that hides the real split: 42% of TT Pre's written reviews are positive against 17% of CB1 Blockly's. TT Pre also leads on ratings volume (141 vs 15) and device support (4 vs 1). On price, rating, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.3 for CB1 Blockly against 3.2 for TT Pre. That said, the two scores are not equally well evidenced: TT Pre has 141 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 17% of CB1 Blockly's written reviews are positive against 42% of TT Pre's.

UpkeepUpdate frequency

CB1 Blockly ships an update every 4 weeks, TT Pre every 2 months. The most recent releases landed on October 15, 2026 and October 23, 2026 respectively.

Scorecard3 real differences · 7 level
CB1 Blockly versus TT Pre: the parameters behind the verdict, then further details
ParameterCB1 BlocklyTT Pre
PriceFreeFree
Rating3.3 (15 ratings) — better3.2 (141 ratings)
Positive reviews16.7% of reviews42.3% of reviews — better
Number of ratings15141 — better
Update frequencyEvery 4 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better12.0
Further details — not scored
Size3 MB84 MB
Age rating4+4+
DeveloperT2T Inc.Teaching Textbooks, Inc.

Customer experience

CB1 Blockly

All ratings13 ratings
Positive53.8%
Neutral0.0%
Negative46.2%
Written reviews6 reviews
Positive16.7%
Neutral0.0%
Negative83.3%

TT Pre

All ratings109 ratings
Positive49.5%
Neutral11.9%
Negative38.5%
Written reviews52 reviews
Positive42.3%
Neutral17.3%
Negative40.4%

Bugs and requests

CB1 Blockly

Not enough reviews yet to summarise bugs or requests.

TT Pre

Reported bugs

27 issues
  • Occasional bugs and glitches
  • It glitched waAaaaayyy too much
  • It’s laggy and buggy
  • INSANELY laggy
  • Answer submission bug is back and annoying
Show 22 more
  • This math is glitchy
  • kicks you out
  • got a problem right and it says not correct
  • really glitchy
  • can now barely even finish a lesson
  • Apple Pencil to help me write out the answers on the scratchpad now it doesn’t work
  • IT FORCE QUITES ON ME!!!
  • super glitchy
  • the man’s voice is awful
  • glitches where you can’t even see the problem
  • the app glitches and says it’s right but counts it wrong
  • About every 3 problems my daughter does, it tells me that the app is not responding
  • computer program seems to crash once every other week
  • when it updates it wont open, even when it’s installed
  • Whenever I come across an equation with the answer being 1/x, the answer will not register
  • Some lessons don’t even have the problems in them
  • sometimes answer explanations will overlap if skipped at the wrong time
  • sometimes when I’m doing a lesson it won’t let me put in a answer
  • when I use the scratchpad, then after some time I use the eraser, the whole app freezes until I have to go out and go back in
  • Cannot get the new lessons to load
  • Get error report that says "Offline"
  • the keypad is super glitchy

Requested features

29 requests
  • Option to mute voice
  • Teach it a little better
  • Multiple voice options
  • Trophies or currency instead of stickers
  • Remove stickers altogether
Show 24 more
  • Add decent designers
  • Change up colors to be more vibrant
  • Add more updates
  • Fix answer submission bug
  • Add more voice actors
  • Fix glitches
  • Improve programming for mobile
  • Make it less childish
  • Add animated wallpapers
  • Fix bugs and glitches
  • Improve app design
  • Fix scratchpad eraser bug
  • Fix app freezing
  • Fix problems with fractions (1/x)
  • Fix incorrect math/information
  • Fix trick questions
  • Fix UI button size
  • Fix lecture playback issue
  • Fix missing problems in lessons
  • Fix overlapping answer explanations
  • Fix inability to input answers
  • Fix app not responding
  • Fix correct answers marked wrong
  • Option to turn off incorrect stickers

In-app purchases

None

CB1 Blockly

No in-app purchases

None

TT Pre

No in-app purchases

Questions

Is CB1 Blockly free?
CB1 Blockly is free to download, with no in-app purchases.
Is TT Pre free?
TT Pre is free to download, with no in-app purchases.
Which has better reviews, CB1 Blockly or TT Pre?
CB1 Blockly is rated higher. CB1 Blockly averages 3.3 out of 5 from 15 ratings, while TT Pre averages 3.2 from 141 ratings.
Do CB1 Blockly or TT Pre have ads?
Neither CB1 Blockly nor TT Pre shows ads.
Which is updated more often, CB1 Blockly or TT Pre?
CB1 Blockly ships an update every 4 weeks, and TT Pre every 2 months. Most recently, CB1 Blockly was updated on October 15, 2026 and TT Pre on October 23, 2026.

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