Number Line, by MLC vs R+ m.Design (ROBOTIS)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Number Line, by MLC
This app allows students to visualize number sequences and demonstrate mathematical strategies. It supports various number types and offers tools for annotation, problem-solving, and sharing work. Ideal for elementary classrooms and iPad learning environments.
- Visualize number sequences
- Demonstrate counting, adding, subtracting, multiplying, dividing
- Use whole numbers, fractions, decimals, or negative numbers
- Add custom tick marks and labels
- Hide and reveal numbers and jumps
- Annotation and drawing tools
- Save and share work
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Number Line helps students visualize number sequences and demonstrate strategies for counting, comparing, adding, subtracting, multiplying, and dividing. Choose number lines labelled with whole numbers, fractions, decimals, or negative numbers. Or use a blank number line, with or without tick marks. Describe intervals between points on the line using forward or backward jumps above and below the line. Jumps can be labelled with their values or left blank. Add custom tick marks to the number line to show equivalence or compare number values. Show strategies with drawing and annotation tools. Hide elements of the sequence shown on the number line, which challenges students to use what they know about number relationships and computation to identify those missing elements. This virtual number line is an open-ended educational tool, ideal for elementary classrooms and other learning environments that use iPads. For more Number Line resources and other apps, visit: www.mathlearningcenter.org/apps FEATURES • Mark the number line with multiples of whole numbers, fractions, or decimals. In addition, set the starting value of the line, including using negative values. • Add and manipulate forward and backward jumps, above or below the line. • Label jump bars, manually or automatically, to show intervals or hide labels altogether. • Add custom tick marks and values to blank number lines. • Hide and reveal numbers on the number line. • Hide and reveal jumps, numbers, and other elements with resizable covers to create your own problems and model strategies. • Use the drawing tools to annotate work and show understanding. • Add equations, expressions, and descriptions with the math text and writing tools. • Share your work by saving an image or providing a share code to others. MORE APPS For more Number Line resources and other apps, visit: www.mathlearningcenter.org/apps LEARN MORE To learn about Bridges in Mathematics, an elementary curriculum that employs visual models like number line, visit: www.mathlearningcenter.org/bridges/overview ABOUT US This resource is brought to you by The Math Learning Center, a nonprofit organization dedicated to K-12 education since 1976. ACKNOWLEDGEMENTS This app was crafted by Clarity Innovations. We help improve teaching and learning by creating solutions that match promising technologies with the needs of education. Visit us: www.clarity-innovations.com
R+ m.Design (ROBOTIS)
This app provides interactive 3D animation assembly manuals for robot kits. Users can preview assembly steps and complete robot construction without traditional manuals. It includes a wide variety of example projects across different robot series.
- 3D animation assembly manuals
- Step-by-step assembly previews
- Interactive touch controls
- Complete robot assembly guides
- Extensive example project library
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R+ m.Design is a 3D based assembly player provided by ROBOTIS a robot solution company. [ Main Features ] 1. Provides 3D animation assembly manuals 2. Checks Assembly steps before getting started 3. Supports touch, drag, expand, and rotation functions 4. Complete robot assembly without a manual [ Examples Included ] *PLAY -21 examples *IDEAS - 77 examples *OLLO - 48 examples *BIOLOID Premium - 29 examples *BIOLOID STEM - 16 examples *DREAM - 47 examples *SMART - 19 examples *SMART2 - 18 examples *ROBOTIS-MINI *Other contents to be uploaded [ Minimum requirements ] iPhone 4S, iPod 5G, iPad mini, iPad 2
Screenshots
Verdict
The clearest difference is review sentiment: Number Line, by MLC at 67% against R+ m.Design (ROBOTIS)'s 0%. Number Line, by MLC also leads on rating (4.4 vs 2.5) and ratings volume (15 vs 4). R+ m.Design (ROBOTIS)'s advantage is update cadence (every 4 months vs every 13 months) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Number Line, by MLC holds the better App Store score, 4.4 against 2.5. Both are backed by a comparable volume of ratings — 15 and 4 respectively. Written reviews point the same way: 67% of Number Line, by MLC's written reviews are positive against 0% of R+ m.Design (ROBOTIS)'s.
Number Line, by MLC ships an update every 13 months, R+ m.Design (ROBOTIS) every 4 months. Both last shipped on November 1, 2026.
| Parameter | Number Line, by MLC | R+ m.Design (ROBOTIS) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) — better | 2.5 (4 ratings) |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 15 — better | 4 |
| Update frequency | Every 13 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 8.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 201 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | ROBOTIS CO., LTD. |
Customer experience
Number Line, by MLC
R+ m.Design (ROBOTIS)
In-app purchases
Number Line, by MLC
No in-app purchases
R+ m.Design (ROBOTIS)
No in-app purchases
Questions
Is Number Line, by MLC free?
Is R+ m.Design (ROBOTIS) free?
Which has better reviews, Number Line, by MLC or R+ m.Design (ROBOTIS)?
Do Number Line, by MLC or R+ m.Design (ROBOTIS) have ads?
Which is updated more often, Number Line, by MLC or R+ m.Design (ROBOTIS)?
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