Number Line, by MLC vs BOT Spelling
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
BOT Spelling
This app helps high school students prepare for the Proofreading section of the Texas UIL Spelling contest. It presents word groups, requiring users to identify and correctly spell misspelled words, reinforcing learning until mastery.
- UIL Proofreading section preparation
- Identify and spell misspelled words
- Incorrectly spelled words repeat
- Progress tracking
- Full content subscription
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Get ahead of the game and on your way to being a champion! Best of Texas Contest's Spelling: Proofreading for high school students helps you learn all the words for the Proofreading section of the Texas UIL Spelling contest. Select the incorrectly spelled word from a group of five words and type in your spelling. Incorrectly spelled words stay in the mix until you have spelled them correctly. Track your progress as you go. A fun and convenient way to learn the words for the High School UIL Spelling & Vocabulary contest. Access to full content requires a subscription. A school-year subscription gives you access to all High School spelling words for the current school year UIL contest.
Screenshots
Verdict
The clearest difference is review sentiment: Number Line, by MLC at 67% against BOT Spelling's 0%. Number Line, by MLC also leads on monetization model (free vs subscription). BOT Spelling's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.1). On price, update cadence, ads and in-app purchases 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 ships an update every 13 months, BOT Spelling every 7 months. The most recent releases landed on October 9, 2026 and October 29, 2026 respectively.
| Parameter | Number Line, by MLC | BOT Spelling |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) — better | — |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 15 — better | — |
| Update frequency | Every 13 months | Every 7 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Subscription |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | Peggy Markham |
Customer experience
Number Line, by MLC
BOT Spelling
In-app purchases
Number Line, by MLC
No in-app purchases
BOT Spelling
No in-app purchases
Questions
Is Number Line, by MLC free?
Is BOT Spelling free?
Do Number Line, by MLC or BOT Spelling have ads?
Which is updated more often, Number Line, by MLC or BOT Spelling?
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