Comparison

tabDo! vs (AR) Number Line

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

Head to head
About

tabDo!

This app offers an innovative method for learning music fundamentals like notes and scales through interactive exercises on tablets. It helps children develop an ear for music by playing, modifying, and improvising melodies, progressing from basic motifs to chromatic scales and note reading.

Highlights
  • Develops audiation skills
  • Trains music listening competencies
  • Enhances individualized learning
  • Introduces musical notation
  • Promotes music-making
  • Multiple interactive functions
Features
Read full description

tabDo! is an innovative app and teaching method for learning music—notes, scales, and playing melodies—on tablets. tabDo! helps the learner develop an inner feeling for notes. During music lessons children actively discover the world of sound by playing well-known melodies, modifying and transforming them, and improvising their own tonal sequences. In the beginning basic melodic skills are trained with solmization—from four-note motifs to the pentatonic scale, then on to the chromatic scale. From listening and playing to reading notes. tabDo! is perfectly suited for all levels of classroom music activities. In this app three different functions are integrated, each of which can be used by either one or two children: The “Guidonian Hand”; a vertical ordering of tones similar to that of a glockenspiel; and a horizontal display of the notes as they are related to the notation. In all three functions the root tone or tonic can be freely varied. Up to 7 levels or degrees of difficulty are available, offering a broad range of notes which can be accessed by students. tabDo! can be adapted to any and every level of learning. The teaching units in tabDo! are ideal for 15- to 20-minute exercise sequences. The flexible app can be used independently of any particular course or song book. With headphones students can also practice exercises and learn music during quiet periods in class. A separate Handbook of Methodologies (HELBLING) offers a wide spectrum of ideas about how to integrate the app into teaching lessons. It shows how easily and effectively tabDo! can be used to train music-listening and note-reading abilities. It also contains a wealth of suggestions about lesson planning and exercising musical skills. What tabDo! offers, in a nutshell: ►Develops audiation skills (comprehension of music notes and their relationships) ►Trains and furthers basic music listening competencies, as well as social skills ►Enhances individualized learning—adapting to the student’s learning speed and level ►Introduces musical notation so that children associate notes with their sounds ►Promotes music-making in the classroom right from the start

About

(AR) Number Line

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!

Screenshots

tabDo!4 screens
(AR) Number Line2 screens

Verdict

The call

The clearest difference is price: (AR) Number Line at $0.99 against tabDo!'s $3.99. tabDo!'s advantage is iOS requirement (11.0 vs 17.0). On update cadence, ads, 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

CostPrice · In-app purchases · Ads · Monetization

tabDo! costs $3.99 and (AR) Number Line $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 6 level
tabDo! versus (AR) Number Line: the parameters behind the verdict, then further details
ParametertabDo!(AR) Number Line
Price$3.99$0.99 — better
Positive reviews83.3% of reviews—
Update frequencyEvery 6 monthsEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size14 MB11 MB
Age rating4+4+
DeveloperHelbling Verlagsgesellschaft m.b.HChristian Urff

In-app purchases

None

tabDo!

No in-app purchases

None

(AR) Number Line

No in-app purchases

Questions

Is tabDo! free?
tabDo! costs $3.99, with no in-app purchases.
Is (AR) Number Line free?
(AR) Number Line costs $0.99, with no in-app purchases.
Do tabDo! or (AR) Number Line have ads?
Neither tabDo! nor (AR) Number Line shows ads.
Which is updated more often, tabDo! or (AR) Number Line?
tabDo! ships an update every 6 months, and (AR) Number Line every 6 months. Most recently, tabDo! was updated on October 2, 2026 and (AR) Number Line on October 7, 2026.

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