Number Line, by MLC vs Math Skills Builder Lite
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
Math Skills Builder Lite
This app helps students apply early numeracy skills to solve real-world math problems. It uses math stories and concrete strategies to teach when to add or subtract. Research indicates the program is highly effective for developing problem-solving abilities.
- Real-world math problem scenarios
- Early numeracy skill application
- Concrete addition/subtraction strategies
- Multiple learning modes
- Research-backed effectiveness
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(Note: This free version limits program to only the first unit and no assessment. Available through in app purchase.) Teaches students how to apply their early numeracy skills to solve problems. Using math stories with real-world scenarios, students learn concrete strategies (using multiple modes of learning) for knowing when to add or subtract to solve the math story. Research found the program extremely effective in teaching students to be successful problem solvers.
Verdict
The clearest difference is rating: Math Skills Builder Lite at 5.0 against Number Line, by MLC's 4.4. Math Skills Builder Lite also leads on iOS requirement (13.0 vs 16.1). Number Line, by MLC's advantage is in-app purchases (none vs 1) and ratings volume (15 vs 1). On price, update cadence, 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
Both are free to download. Math Skills Builder Lite sells 1 one-off in-app purchase. Number Line, by MLC asks for nothing beyond the download.
Math Skills Builder Lite holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Number Line, by MLC has 15 ratings behind it against 1, so its average is the more settled of the two.
Number Line, by MLC ships an update every 13 months, Math Skills Builder Lite every 19 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Number Line, by MLC | Math Skills Builder Lite |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 15 — better | 1 |
| Update frequency | Every 13 months — better | Every 19 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPad |
| Requires iOS | 16.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 191 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | Attainment Company |
Customer experience
Number Line, by MLC
Math Skills Builder Lite
In-app purchases
Number Line, by MLC
No in-app purchases
Math Skills Builder Lite
- Full Version$59.99
Questions
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