Comparison

Number Line, by MLC vs Terrific Triangle

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

Terrific Triangle

Practice math fact families for addition, subtraction, multiplication, and division. This educational tool offers individual fact practice with a score and adjustable difficulty, including an optional timer. It's a free, ad-free way to master number relationships.

Highlights
  • Fact family practice
  • Addition/subtraction drills
  • Multiplication/division drills
  • Adjustable difficulty
  • Optional timer
  • Running score
Features
Read full description

A math facts drill-and-practice program that teaches fact families for both addition/subtraction and multiplication/division. Terrific Triangle allows individual facts practice with a running score for correct answers. The player may select a difficulty level and whether to play against a timer. The triangle presents two parts of a fact family and the player must determine the missing third part. The sum and product always appear at the top of the triangle. The addends and factors always go in the two lower corners. This app contains no ads or links to social media. Just FREE.

Screenshots

Terrific Triangle4 screens

Verdict

The call

The clearest difference is rating: Number Line, by MLC at 4.4 against Terrific Triangle's 4.0. Number Line, by MLC also leads on ratings volume (15 vs 5). Terrific Triangle's advantage is device support (3 vs 1) and iOS requirement (12.0.0 vs 16.1). On price, review sentiment, update cadence 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 4.0. Both are backed by a comparable volume of ratings — 15 and 5 respectively. Written reviews split almost evenly too, at 67% and 67% positive.

UpkeepUpdate frequency

Number Line, by MLC ships an update every 13 months, Terrific Triangle every 10 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
Number Line, by MLC versus Terrific Triangle: the parameters behind the verdict, then further details
ParameterNumber Line, by MLCTerrific Triangle
PriceFreeFree
Rating4.4 (15 ratings) — better4.0 (5 ratings)
Positive reviews66.7% of reviews66.7% of reviews
Number of ratings15 — better5
Update frequencyEvery 13 monthsEvery 10 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.112.0.0 — better
Further details — not scored
Size7 MB32 MB
Age rating4+4+
DeveloperThe Math Learning CenterElementary Software

Customer experience

Number Line, by MLC

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

Terrific Triangle

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Number Line, by MLC

No in-app purchases

None

Terrific Triangle

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 Terrific Triangle free?
Terrific Triangle is free to download, with no in-app purchases.
Which has better reviews, Number Line, by MLC or Terrific Triangle?
Number Line, by MLC is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while Terrific Triangle averages 4.0 from 5 ratings.
Do Number Line, by MLC or Terrific Triangle have ads?
Neither Number Line, by MLC nor Terrific Triangle shows ads.
Which is updated more often, Number Line, by MLC or Terrific Triangle?
Number Line, by MLC ships an update every 13 months, and Terrific Triangle every 10 months. Most recently, Number Line, by MLC was updated on November 6, 2026 and Terrific Triangle on November 2, 2026.

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