Comparison

1 · 1 Tool 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

1 · 1 Tool

Features
Read full description

Das 1·1tool unterstützt durch 8 Aufgabentypen die ganzheitliche Einführung des Einmaleins. Das Einmaleins wird dabei schrittweise material- und sprachgestützt eingeführt, um langfristige Lösungsstrategien aufzubauen. Hinweis: Die App benötigt zusätzliche Materialien um korrekt verwendet zu werden!

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!

Screenshots

(AR) Number Line2 screens

Verdict

The call

The clearest difference is price: 1 · 1 Tool at Free against (AR) Number Line's $0.99. 1 · 1 Tool also leads on update cadence (every 2 weeks vs every 5 months) and iOS requirement (12.0 vs 17.0). On 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

1 · 1 Tool is free to download; (AR) Number Line costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

1 · 1 Tool ships an update every 2 weeks, (AR) Number Line every 5 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 6 level
1 · 1 Tool versus (AR) Number Line: the parameters behind the verdict, then further details
Parameter1 · 1 Tool(AR) Number Line
PriceFree — better$0.99
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPadiPhone, iPad — better
Requires iOS12.0 — better17.0
Further details — not scored
Size559 MB96 MB
Age rating4+4+
DeveloperAnne RahnChristian Urff

In-app purchases

None

1 · 1 Tool

No in-app purchases

None

(AR) Number Line

No in-app purchases

Questions

Is 1 · 1 Tool free?
1 · 1 Tool is free to download, with no in-app purchases.
Is (AR) Number Line free?
(AR) Number Line costs $0.99, with no in-app purchases.
Do 1 · 1 Tool or (AR) Number Line have ads?
Neither 1 · 1 Tool nor (AR) Number Line shows ads.
Which is updated more often, 1 · 1 Tool or (AR) Number Line?
1 · 1 Tool ships an update every 2 weeks, and (AR) Number Line every 5 months. Most recently, 1 · 1 Tool was updated on November 3, 2026 and (AR) Number Line on November 4, 2026.

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