Comparison

(AR) Number Line vs Quazzl AI

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

Head to head
About

(AR) Number Line

This educational app uses augmented reality and interactive number lines to help primary and lower secondary students develop number concepts. It offers adaptive exercises, games, and an AI tutor to support independent learning and practice.

Highlights
  • Augmented reality number line
  • Classic number line interface
  • Adaptive exercises and games
  • AI tutor for feedback and hints
  • Configurable number ranges
  • Learning reports for teachers
Features
Read full description

Number Line is a learning app for primary school and the lower secondary level that systematically supports the development of number concepts through number line estimation tasks. It offers multiple exploratory environments for independent investigation and presentation, as well as a wide range of exercises and games with individual, adaptive adjustment options. At the core of the app is the number line in two variants: an augmented reality number line for exploring numbers “in space,” and a classic, non-AR number line for focused work on the screen. The AR number line is particularly suitable for developing number range concepts (especially in larger number ranges) and for learning through movement, while the classic number line enables a deeper engagement with numbers and numerical relationships. Using this dynamic tool, children place numbers, compare distances, find positions, discover relationships, and illustrate calculation strategies in an action-oriented way. In addition, the app includes numerous practice formats and learning games centered on numbers on the number line, which are specifically designed to address different levels of learning. Tasks adapt to the learner’s abilities and support practice in small, motivating steps—ideal for independent work, learning stations, weekly plans, targeted support, or practice at home. When errors occur or support is needed, children receive helpful feedback and hints from an AI tutor, which explains effective strategies for locating numbers and encourages further thinking. The AI tutor is optional, uses the internet, and can be deactivated at any time—ensuring flexibility for different teaching situations and needs. No personal data is transmitted when generating individualized feedback. Number Line is suitable for explanation phases, demonstration phases, inquiry-based learning tasks, individual learning, partner work, as well as targeted diagnosis and support. The number range and numerous additional display options can be freely configured—from number ranges up to 20 to negative numbers and decimal numbers. A learning report provides teachers with ongoing information about children’s competencies and difficulties. Please support the further development and improvement of the AI tutor by providing anonymized log data for scientific evaluation. This can be enabled easily in the settings. Thank you very much!

About

Quazzl AI

Immerse yourself in interactive stories to learn new languages. Choose your own adventure, test your comprehension with quizzes, and improve pronunciation by listening to native speakers. Customize difficulty and explore various genres for a fun and engaging learning experience.

Highlights
  • AI-authored interactive stories
  • Choose story direction
  • Multiple-choice comprehension quizzes
  • Listen to sentence pronunciation
  • Adjustable difficulty levels
  • Multiple story genres
Features
Read full description

Learning a language has never been so much fun! Why settle for banal sentences when you can immerse yourself in exciting stories written according to your rules instead? * AI AUTHOR: Enjoy interactive stories in 56 languages! * YOUR CHOICE: Influence the story by choosing the direction of the story after each chapter! * TEST YOURSELF: Collect points with multiple-choice questions about the content of each chapter! * LISTEN: Listen to how to write a sentence so you can speak like a pro! * ADAPT: Customize your learning experience by adjusting the difficulty level! * YOUR STYLE: Genres like mystery, children's books, romance, science fiction and more! * COMPETITION: Track your progress and compete with others. Download Quazzl and start your language learning adventure today! Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

(AR) Number Line2 screens
Quazzl AI4 screens

Verdict

The call

The clearest difference is price: Quazzl AI at Free against (AR) Number Line's $0.99. Quazzl AI also leads on rating (4.7 vs 1.0) and update cadence (every 2 days vs every 5 months). (AR) Number Line's advantage is in-app purchases (none vs 3). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Quazzl AI is free to download; (AR) Number Line costs $0.99 up front. Quazzl AI sells 3 in-app purchases, starting at $6.00 per month. (AR) Number Line asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Quazzl AI holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Quazzl AI has 95 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

(AR) Number Line ships an update every 5 months, Quazzl AI every 2 days. Both last shipped on November 4, 2026.

Scorecard7 real differences · 3 level
(AR) Number Line versus Quazzl AI: the parameters behind the verdict, then further details
Parameter(AR) Number LineQuazzl AI
Price$0.99Free — better
Rating1.0 (1 ratings)4.7 (95 ratings) — better
Positive reviews—59.5% of reviews
Number of ratings195 — better
Update frequencyEvery 5 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.013.4 — better
Further details — not scored
Size96 MB40 MB
Age rating4+9+
DeveloperChristian Urffraffiniert media AG

Customer experience

(AR) Number Line

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Quazzl AI

All ratings94 ratings
Positive91.5%
Neutral4.3%
Negative4.3%
Written reviews42 reviews
Positive59.5%
Neutral16.7%
Negative23.8%

Bugs and requests

(AR) Number Line

Not enough reviews yet to summarise bugs or requests.

Quazzl AI

Reported bugs

14 issues
  • Special offer for 3 days in a row not working
  • App not working properly
  • Cannot enter homepage
  • Accidental purchase of subscription
  • Refund request refused
Show 9 more
  • Developer claiming user wrote 5-star review initially
  • Developer ignoring emails and Instagram messages
  • Crash when clicking words to translate
  • Small stories crash after a few clicks
  • App keeps asking for name
  • App crashes from second chapter onwards when clicking paragraph translation
  • AI generated stories spit out gibberish English
  • Severe crashing
  • App is busted

Requested features

22 requests
  • Add way to contact developers
  • Fix issue with special offer for 3 days in a row
  • Make iPad-native version
  • Add ability to tap word and create flashcard
  • Improve voice to sound more native
Show 17 more
  • Add more languages in the future
  • Add male and female voice options
  • Add Cantonese pronunciation
  • Add word book to record words
  • Allow clicking on individual words for definition and pronunciation
  • Select one word for specific translation within sentence translation
  • Have voice speak out entire story without clicking sentences
  • Ability to stop and start story from any word
  • Option to delete unneeded AI stories
  • Add tools for full learning experience
  • Save unfamiliar words and review them
  • Track commonly used words for language learning levels
  • Add notification for moving to next level
  • Increase voice options and custom interface
  • Add "log in with email" option
  • Improve onboarding process
  • Fix app asking for name repeatedly

In-app purchases

None

(AR) Number Line

No in-app purchases

3 purchases

Quazzl AI

Subscriptions2
  • Monthly Subscription$6.001 Month
  • Annual Subscription7 Days trial$60.001 Year
One-time1
  • Lebensdauer$199.99

Questions

Is (AR) Number Line free?
(AR) Number Line costs $0.99, with no in-app purchases.
Is Quazzl AI free?
Quazzl AI is free to download, with in-app purchases available.
Which has better reviews, (AR) Number Line or Quazzl AI?
Quazzl AI is rated higher. (AR) Number Line averages 1.0 out of 5 from 1 ratings, while Quazzl AI averages 4.7 from 95 ratings.
Do (AR) Number Line or Quazzl AI have ads?
Neither (AR) Number Line nor Quazzl AI shows ads.
Which is updated more often, (AR) Number Line or Quazzl AI?
(AR) Number Line ships an update every 5 months, and Quazzl AI every 2 days. Most recently, (AR) Number Line was updated on November 4, 2026 and Quazzl AI on November 4, 2026.

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