Number Line, by MLC vs MATHCOUNTS Trainer
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
MATHCOUNTS Trainer
Prepare for MATHCOUNTS competitions with thousands of practice problems from past events. Learn from detailed solutions, track your progress, and compete with others on the leaderboard. This free tool is designed for aspiring mathletes of all skill levels.
- Thousands of practice problems
- Problems from past competitions
- Full solutions provided
- Progress tracking
- Leaderboard competition
- Practice for all levels
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Train your way to Nationals with the free MATHCOUNTS Trainer presented by Art of Problem Solving! With thousands of problems from previous School, Chapter, State, and National MATHCOUNTS competitions, the Trainer is great practice for aspiring MATHCOUNTS Mathletes of all levels. Full solutions are provided for every problem so players can learn how to approach even the toughest questions. Track your progress, compete against others, and see if you can climb to the top of the Leaderboard on the new MATHCOUNTS Trainer today! MATHCOUNTS Trainer only supports Guest mode on iOS. Play online at aops.com/mc for the full training experience. MATHCOUNTS® and Mathlete® are registered trademarks of the MATHCOUNTS Foundation.
Screenshots
Verdict
The clearest difference is update cadence: MATHCOUNTS Trainer at every 3 months against Number Line, by MLC's every 13 months. MATHCOUNTS Trainer also leads on ratings volume (110 vs 15) and device support (3 vs 1). On price, rating, review sentiment and ads 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 4.2. That said, the two scores are not equally well evidenced: MATHCOUNTS Trainer has 110 ratings behind it against 15, so its average is the more settled of the two. Written reviews complicate that: 67% of Number Line, by MLC's written reviews are positive against 71% of MATHCOUNTS Trainer'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, MATHCOUNTS Trainer every 3 months. Both last shipped on November 1, 2026.
| Parameter | Number Line, by MLC | MATHCOUNTS Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) — better | 4.2 (110 ratings) |
| Positive reviews | 66.7% of reviews | 70.7% of reviews — better |
| Number of ratings | 15 | 110 — better |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | Art of Problem Solving |
Customer experience
Number Line, by MLC
MATHCOUNTS Trainer
Bugs and requests
Number Line, by MLC
Not enough reviews yet to summarise bugs or requests.
MATHCOUNTS Trainer
Reported bugs
13 issues- Lot of bugs on iPad
- Drawing tool doesn't work well
- Answer doesn't show in dark mode
- Accidentally make window go away
- Don't see numbers on answer box on iPhone
Show 8 moreShow fewer
- Cannot draw vertical and diagonal lines
- Screen got smaller after update
- Writing disappeared from screen after update
- App login failed every time
- Keeps saying 'invalid password'
- Cannot log in, takes long to load
- Web login works, app fails
- A line keeps appearing on the bottom
Requested features
18 requests- Fix bugs
- Add Alcumus
- Add timer
- Separate competition rounds (Sprint, Target, Team)
- Create a math league app
Show 13 moreShow fewer
- Add a drawing tool
- Fix dark mode answer visibility
- Fix accidental window closure
- Fix drawing tool issues
- Fix numbers cut off in answer box
- Fix vertical/diagonal drawing issues
- Fix screen size after update
- Improve login process
- Add countdown round trainer
- Add a soundtrack
- Add calculator for target questions
- Separate problems by category
- Add FTW and Alcumus apps
In-app purchases
Number Line, by MLC
No in-app purchases
MATHCOUNTS Trainer
No in-app purchases
Questions
Is Number Line, by MLC free?
Is MATHCOUNTS Trainer free?
Which has better reviews, Number Line, by MLC or MATHCOUNTS Trainer?
Do Number Line, by MLC or MATHCOUNTS Trainer have ads?
Which is updated more often, Number Line, by MLC or MATHCOUNTS Trainer?
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