Comparison

FLEX vs Kattalo

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

Head to head
About

FLEX

This interactive educational tool helps teachers visualize basic math concepts like fractions and number lines. It allows for the creation of independent student projects and supplements math training programs. Enhance understanding of mathematical skills with various visual aids.

Highlights
  • Number lines visualization
  • Fraction tools
  • Number bonds
  • Number blocks
  • Create student projects
  • Mathematical symbols
Features
Read full description

FLEX - Math Tools is an interactive tool for teaching basic mathematics. It contains several different tools to enhance the understanding of mathematical concepts. With FLEX - Math Tools, you as a teacher visualize new mathematical concepts with your students using for example number bonds, fractions and number lines. You can also create projects for your students that they can independently work with. The app can also be used as a supplement for students who train with Number Quest Flex. With FLEX - Math Tools you as a teachers can facilitate understanding regarding the specific mathematical skills that are trained in the program. Please visit our website for more information. FLEX - Math Tools contains the following tools: โ€ข numbers โ€ข mathematical symbols โ€ข number lines โ€ข fractions - Rectangles โ€ข number bonds โ€ข number blocks โ€ข images

About

Kattalo

Features
Read full description

Kattalo trains the skills that reading and writing actually demand โ€“ letter sounds, phonics, spelling, and word comprehension. Not as flashcards. As exercises learners want to repeat. The app suits learners in special education settings, those with dyslexia or other learning differences, and anyone who needs more time with the fundamentals โ€“ regardless of year group. Voice instructions and a stripped-back interface let learners work independently. Exercises span letter recognition, phonological awareness, spelling, and creative writing โ€“ from first letters to more advanced text production.

Screenshots

FLEX4 screens

Verdict

The call

The clearest difference is update cadence: Kattalo at every 9 days against FLEX's every 19 months. FLEX's advantage is device support (3 vs 1) and iOS requirement (9.3 vs 15.0). On price, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

FLEX ships an update every 19 months, Kattalo every 9 days. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

Scorecard3 real differences ยท 5 level
FLEX versus Kattalo: the parameters behind the verdict, then further details
ParameterFLEXKattalo
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 19 monthsEvery 9 days โ€” better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPad, iPod โ€” betteriPad
Requires iOS9.3 โ€” better15.0
Further details โ€” not scored
Size7 MB64 MB
Age rating4+4+
DeveloperLeripa ABKattalo AB

In-app purchases

None

FLEX

No in-app purchases

None

Kattalo

No in-app purchases

Questions

Is FLEX free?
FLEX is free to download, with no in-app purchases.
Is Kattalo free?
Kattalo is free to download, with no in-app purchases.
Do FLEX or Kattalo have ads?
Neither FLEX nor Kattalo shows ads.
Which is updated more often, FLEX or Kattalo?
FLEX ships an update every 19 months, and Kattalo every 9 days. Most recently, FLEX was updated on October 16, 2026 and Kattalo on October 24, 2026.

Other comparisons