Number Line, by MLC vs ScratchUP
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
ScratchUP
This app allows users to learn, teach, and play with code. It offers a variety of features for creating educational activities, including sensor integration, machine learning capabilities, and math tools. Compatible with Scratch files, it provides an offline coding experience for students and educators.
- Scratch file compatibility (.sb2, .sb3)
- Sensor event integration (touch, keyboard, camera, Bluetooth)
- Machine learning for object and sound recognition
- Body detection, Handpose, and Facemesh
- QRCode scanner
- Math tools for learning
- Offline app functionality
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ScratchUP is the perfect app for students, teachers, and anyone who wants to learn coding. Use it in the classroom or at home to create interactive projects, explore programming concepts, and design educational activities with endless possibilities. Scratch-compatible: open and save .sb2 and .sb3 files with ease. Build richer projects by combining touch events, keyboard input, camera features, and Bluetooth sensor data. A fullscreen offline app packed with powerful features: - Virtual keyboard for managing key events - Bluetooth connection to devices such as micro:bit - Body Detection, Hand Pose, and Face Mesh powered by machine learning - QR code scanner - Train your own object recognition models with machine learning - Import Teachable Machine models to recognize objects and sounds - Built-in math tools for easier learning - Control the front and back cameras directly in code - New Function extension for creating more advanced programs - New option to hide blocks in the interface and in scripts for a cleaner workspace - Native iPadOS export to share projects instantly via AirDrop or email - Export scripts as images to easily add them to worksheets, lessons, or other documents Code, learn, teach, and play — all in one app. Enjoy!
Verdict
The clearest difference is price: Number Line, by MLC at Free against ScratchUP's $0.99. Number Line, by MLC also leads on rating (4.4 vs 4.0) and ratings volume (15 vs 4). ScratchUP's advantage is update cadence (every 4 months vs every 13 months) and review sentiment (75% vs 67%). On ads, in-app purchases, device support and iOS requirement 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
Number Line, by MLC is free to download; ScratchUP costs $0.99 up front. 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 4.0. Both are backed by a comparable volume of ratings — 15 and 4 respectively. Written reviews complicate that: 67% of Number Line, by MLC's written reviews are positive against 75% of ScratchUP's, so the app with the better star average is not the one people write more warmly about.
Number Line, by MLC ships an update every 13 months, ScratchUP every 4 months. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.
| Parameter | Number Line, by MLC | ScratchUP |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.4 (15 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 66.7% of reviews | 75.0% of reviews — better |
| 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 — better | Paid |
| Devices | iPad | iPad |
| Requires iOS | 16.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 476 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | Ulrich PICAUD |
Customer experience
Number Line, by MLC
ScratchUP
In-app purchases
Number Line, by MLC
No in-app purchases
ScratchUP
No in-app purchases
Questions
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Is ScratchUP free?
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