Comparison

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.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

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.

Highlights
  • Thousands of practice problems
  • Problems from past competitions
  • Full solutions provided
  • Progress tracking
  • Leaderboard competition
  • Practice for all levels
Features
Read full description

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

MATHCOUNTS Trainer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Number Line, by MLC ships an update every 13 months, MATHCOUNTS Trainer every 3 months. Both last shipped on November 1, 2026.

Scorecard4 real differences · 6 level
Number Line, by MLC versus MATHCOUNTS Trainer: the parameters behind the verdict, then further details
ParameterNumber Line, by MLCMATHCOUNTS Trainer
PriceFreeFree
Rating4.4 (15 ratings) — better4.2 (110 ratings)
Positive reviews66.7% of reviews70.7% of reviews — better
Number of ratings15110 — better
Update frequencyEvery 13 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.112.0 — better
Further details — not scored
Size7 MB37 MB
Age rating4+4+
DeveloperThe Math Learning CenterArt of Problem Solving

Customer experience

Number Line, by MLC

All ratings15 ratings
Positive86.7%
Neutral0.0%
Negative13.3%
Written reviews12 reviews
Positive66.7%
Neutral16.7%
Negative16.7%

MATHCOUNTS Trainer

All ratings102 ratings
Positive80.4%
Neutral2.0%
Negative17.6%
Written reviews41 reviews
Positive70.7%
Neutral4.9%
Negative24.4%

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 more
  • 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 more
  • 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

None

Number Line, by MLC

No in-app purchases

None

MATHCOUNTS Trainer

No in-app purchases

Questions

Is Number Line, by MLC free?
Number Line, by MLC is free to download, with no in-app purchases.
Is MATHCOUNTS Trainer free?
MATHCOUNTS Trainer is free to download, with no in-app purchases.
Which has better reviews, Number Line, by MLC or MATHCOUNTS Trainer?
Number Line, by MLC is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while MATHCOUNTS Trainer averages 4.2 from 110 ratings.
Do Number Line, by MLC or MATHCOUNTS Trainer have ads?
Neither Number Line, by MLC nor MATHCOUNTS Trainer shows ads.
Which is updated more often, Number Line, by MLC or MATHCOUNTS Trainer?
Number Line, by MLC ships an update every 13 months, and MATHCOUNTS Trainer every 3 months. Most recently, Number Line, by MLC was updated on November 1, 2026 and MATHCOUNTS Trainer on November 1, 2026.

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