Comparison

Third 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

Third

This app covers a range of third-grade math topics, including number identification up to the millennium, identifying largest and smallest numbers, consecutive and previous numbers, and basic multiplication and division. It also includes exercises to find missing numbers.

Highlights
  • Number identification up to the millennium
  • Largest and smallest number identification
  • Consecutive and previous number concepts
  • Subtraction and multiplication in the millennium
  • Division of tens and hundreds
  • Missing number exercises
Features
Read full description

Topics covered: Identification numbers in the Millennium What is the largest number What is the smallest number Consecutive numbers Previous numbers Connection in the Millennium Subtraction in the Millennium Hundreds multiplication Divide tens and hundreds What is missing in the exercise

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

Third4 screens

Verdict

The call

The clearest difference is review sentiment: Number Line, by MLC at 67% against Third's 0%. Number Line, by MLC also leads on rating (4.4 vs 2.7) and ratings volume (15 vs 3). Third's advantage is device support (3 vs 1) and iOS requirement (8.0 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 2.7. That said, the two scores are not equally well evidenced: Number Line, by MLC has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Third's written reviews are positive against 67% of Number Line, by MLC's.

UpkeepUpdate frequency

Third ships an update every 12 months, Number Line, by MLC every 13 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Third versus Number Line, by MLC: the parameters behind the verdict, then further details
ParameterThirdNumber Line, by MLC
PriceFreeFree
Rating2.7 (3 ratings)4.4 (15 ratings) — better
Positive reviews0.0% of reviews66.7% of reviews — better
Number of ratings315 — better
Update frequencyEvery 12 months — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS8.0 — better16.1
Further details — not scored
Size6 MB7 MB
Age rating4+4+
Developerrana nirThe Math Learning Center

Customer experience

Third

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

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

Third

No in-app purchases

None

Number Line, by MLC

No in-app purchases

Questions

Is Third free?
Third 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, Third or Number Line, by MLC?
Number Line, by MLC is rated higher. Third averages 2.7 out of 5 from 3 ratings, while Number Line, by MLC averages 4.4 from 15 ratings.
Do Third or Number Line, by MLC have ads?
Neither Third nor Number Line, by MLC shows ads.
Which is updated more often, Third or Number Line, by MLC?
Third ships an update every 12 months, and Number Line, by MLC every 13 months. Most recently, Third was updated on November 1, 2026 and Number Line, by MLC on November 6, 2026.

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