Comparison

Number Line, by MLC vs Delta

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

Delta

This app helps users solve math problems by creating and executing algorithms. It offers tools for homework checking, test preparation, and creating custom quizzes. Users can save, share, and download algorithms via the cloud.

Highlights
  • Create algorithms with natural language
  • Execute algorithms to solve math problems
  • Create and download custom quizzes
  • Save and share algorithms
  • Cloud synchronization for algorithms
Features
Read full description

With Delta: Algorithms, quickly solve any math problem with an algorithm. Save time checking your homework or studying for a test, it’s free! AVAILABLE FEATURES - Create algorithms with an easy and natural language in the editor - Quickly execute algorithms to solve any math problem - Create (or download) a quiz to train yourself - Save your algorithms on your device, share then on the Cloud, or download ready-to-use algorithms shared by other people EXAMPLE OF USAGE - Create an automated calculator for well known theorems or equations - Create a quiz to train solving equations CLOUD SUBSCRIPTION A Cloud subscription is available; It allows you to synchronize your algorithms across your devices and share them with other people on the Cloud. Application developed by Nathan Fallet © 2020 Groupe MINASTE

Screenshots

Delta4 screens

Verdict

The call

The clearest difference is rating: Number Line, by MLC at 4.4 against Delta's 3.1. Number Line, by MLC also leads on in-app purchases (none vs 3). Delta's advantage is update cadence (monthly vs every 13 months) and device support (4 vs 1). On price, review sentiment, ratings volume 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. Delta sells 3 one-off in-app purchases. Number Line, by MLC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Number Line, by MLC holds the better App Store score, 4.4 against 3.1. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews split almost evenly too, at 67% and 67% positive.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
Number Line, by MLC versus Delta: the parameters behind the verdict, then further details
ParameterNumber Line, by MLCDelta
PriceFreeFree
Rating4.4 (15 ratings) — better3.1 (7 ratings)
Positive reviews66.7% of reviews66.7% of reviews
Number of ratings15 — better7
Update frequencyEvery 13 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPadiPhone, iPad, iPod, Mac — better
Requires iOS16.113.0 — better
Further details — not scored
Size7 MB5 MB
Age rating4+4+
DeveloperThe Math Learning CenterGroupe MINASTE

Customer experience

Number Line, by MLC

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

Delta

All ratings7 ratings
Positive57.1%
Neutral0.0%
Negative42.9%
Written reviews9 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

In-app purchases

None

Number Line, by MLC

No in-app purchases

3 purchases

Delta

One-time3
  • Donation 1$0.99
  • Donation 2$2.99
  • Donation 3$4.99

Questions

Is Number Line, by MLC free?
Number Line, by MLC is free to download, with no in-app purchases.
Is Delta free?
Delta is free to download, with in-app purchases available.
Which has better reviews, Number Line, by MLC or Delta?
Number Line, by MLC is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while Delta averages 3.1 from 7 ratings.
Do Number Line, by MLC or Delta have ads?
Neither Number Line, by MLC nor Delta shows ads.
Which is updated more often, Number Line, by MLC or Delta?
Number Line, by MLC ships an update every 13 months, and Delta monthly. Most recently, Number Line, by MLC was updated on November 6, 2026 and Delta on November 2, 2026.

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