Number Line, by MLC vs Osmo Math Buzz
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
Osmo Math Buzz
Engage in collaborative math practice with up to four players, solving equations to overcome challenges and collect rewards. Designed for children aged 6-10, this app transforms screen time into hands-on learning through interactive play.
- Team-based math practice
- Addition, subtraction, multiplication
- Collaborative play
- Hands-on learning system
- Ages 6-10
- Tangible play with digital learning
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With your team of up to 4 players, solve math equations to get past unfriendly bugs and collect all of the honey in the garden. TEAM UP TO PRACTICE YOUR MATH SKILLS Practice addition, subtraction, multiplication and teamwork with a friend! EXPLORE CORE LEARNING SUBJECTS THROUGH PLAY Designed for children ages 6-10 to build skills through fun collaborative play. TURN SCREEN TIME INTO LEARNING TIME Osmo’s unique technology transforms your tablet into a hands-on learning system! *Play your favourite Osmo Math Buzz on both iPhone and iPad! Use your iPhone with the Osmo Base for iPad and Numbers tiles - each can be found at playosmo.com. * Please see our device compatibility list here: https://support.playosmo.com/hc/articles/115010156067 *Requires the Osmo Base for iPad and Numbers tiles. Each sold separately or as part of Osmo Genius Starter Kit. Learn more by visiting www.playosmo.com. ABOUT OSMO -- 21ST CENTURY PLAY AND LEARNING Osmo combines healthy screen time and tangible play to make learning engaging and fun. Every Osmo game uses physical action and reflective artificial intelligence technology for digital learning in the real world. Help your child become more confident, thoughtful, and creative with Osmo.
Screenshots
Verdict
The clearest difference is review sentiment: Number Line, by MLC at 67% against Osmo Math Buzz's 13%. Number Line, by MLC also leads on rating (4.4 vs 3.0) and in-app purchases (none vs 2). Osmo Math Buzz's advantage is update cadence (every 2 months vs every 13 months) and ratings volume (143 vs 15). On price, ads 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
Both are free to download. Osmo Math Buzz sells 2 one-off in-app purchases. Number Line, by MLC asks for nothing beyond the download.
Number Line, by MLC holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Osmo Math Buzz has 143 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 67% of Number Line, by MLC's written reviews are positive against 13% of Osmo Math Buzz's.
Number Line, by MLC ships an update every 13 months, Osmo Math Buzz every 2 months. The most recent releases landed on October 9, 2026 and October 27, 2026 respectively.
| Parameter | Number Line, by MLC | Osmo Math Buzz |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) — better | 3.0 (143 ratings) |
| Positive reviews | 66.7% of reviews — better | 13.3% of reviews |
| Number of ratings | 15 | 143 — better |
| Update frequency | Every 13 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 264 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | Tangible Play |
Customer experience
Number Line, by MLC
Osmo Math Buzz
Bugs and requests
Number Line, by MLC
Not enough reviews yet to summarise bugs or requests.
Osmo Math Buzz
Reported bugs
10 issues- App freezes on Osmo logo
- App does not load
- App crashes during gameplay
- Lost progress after crashes
- Login issues and purchase restoration problems
Show 5 moreShow fewer
- Reader not recognizing tiles
- Screen freezes after selecting base
- App not loading past white Osmo screen
- Progress data disappeared
- IAP unlock button not working
Requested features
8 requests- Fix the app loading issue
- Improve app stability
- Make the game more engaging
- Provide clearer instructions
- Ensure progress is saved
Show 3 moreShow fewer
- Make trial cancellation easier
- Address wasp behavior randomness
- Update app for current devices
In-app purchases
Number Line, by MLC
No in-app purchases
Osmo Math Buzz
- 3-day trial of Math BuzzFree
- Unlock Math Buzz$24.99
Questions
Is Number Line, by MLC free?
Is Osmo Math Buzz free?
Which has better reviews, Number Line, by MLC or Osmo Math Buzz?
Do Number Line, by MLC or Osmo Math Buzz have ads?
Which is updated more often, Number Line, by MLC or Osmo Math Buzz?
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