Comparison

Count Sort vs Number Line, by MLC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Count Sort

This app introduces young children to basic number concepts and counting. It helps them understand one-to-one correspondence and early numeral recognition with adjustable counting targets. An iPad version offers 10 Frames for visual counting.

Highlights
  • One-to-one counting practice
  • Adjustable counting targets (up to 32)
  • Early numeral recognition
  • Number family recognition
  • 10 Frames option (iPad)
Features
Read full description

A very basic set of activities for children just beginning to learn about numbers. Using numbers up to 32, Count Sort helps children recognize that counting must be done in a “one-to-one” fashion. Options exist to limit the counting target to 10, 15, 20, 25, and 32 chips. The activities also develop early numeral recognition and early recognition of number “families.” The iPad version includes an option to display the chips in 10 Frames. Developed as part of the Number Sense Project at Augustana College in Rock Island, IL.

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

Screenshots

Count Sort4 screens

Verdict

The call

The clearest difference is rating: Number Line, by MLC at 4.4 against Count Sort's 1.0. Number Line, by MLC also leads on review sentiment (67% vs 50%) and ratings volume (15 vs 1). Count Sort's advantage is device support (3 vs 1) and iOS requirement (10.0 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

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 1.0. 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. Written reviews point the same way: 50% of Count Sort's written reviews are positive against 67% of Number Line, by MLC's.

UpkeepUpdate frequency

Count Sort ships an update every 7 months, Number Line, by MLC every 13 months. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Count Sort versus Number Line, by MLC: the parameters behind the verdict, then further details
ParameterCount SortNumber Line, by MLC
PriceFreeFree
Rating1.0 (1 ratings)4.4 (15 ratings) — better
Positive reviews50.0% of reviews66.7% of reviews — better
Number of ratings115 — better
Update frequencyEvery 7 months — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS10.0 — better16.1
Further details — not scored
Size41 MB7 MB
Age rating4+4+
DeveloperClassroom Focused SoftwareThe Math Learning Center

Customer experience

Count Sort

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Number Line, by MLC

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

In-app purchases

None

Count Sort

No in-app purchases

None

Number Line, by MLC

No in-app purchases

Questions

Is Count Sort free?
Count Sort is free to download, with no in-app purchases.
Is Number Line, by MLC free?
Number Line, by MLC is free to download, with no in-app purchases.
Which has better reviews, Count Sort or Number Line, by MLC?
Number Line, by MLC is rated higher. Count Sort averages 1.0 out of 5 from 1 ratings, while Number Line, by MLC averages 4.4 from 15 ratings.
Do Count Sort or Number Line, by MLC have ads?
Neither Count Sort nor Number Line, by MLC shows ads.
Which is updated more often, Count Sort or Number Line, by MLC?
Count Sort ships an update every 7 months, and Number Line, by MLC every 13 months. Most recently, Count Sort was updated on October 3, 2026 and Number Line, by MLC on October 9, 2026.

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