Comparison

Number Line, by MLC vs TurtleDiary

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

TurtleDiary

Interactive educational games, videos, quizzes, and worksheets for K-5 students. Covers math, language, typing, science, and geography to enhance classroom success and retention.

Highlights
  • 500+ educational games
  • 350+ learning videos
  • 500+ online quizzes
  • Interactive math games
  • Language and art games
  • Typing lessons
  • Multiplayer games
Features
Read full description

Our educational apps and games offer interactive educational activities for grades K to 5 presented through games, videos, quizzes, & worksheets. TurtleDiary activities & games enhance retention of material & increase success in the classroom. Educational Activities Games The TurtleDiary App offers 500+ educational games that are fun, learning, interactive & are 100% free to use. Math Games: From basic topics like Addition, Subtraction, Multiplication, & Division, to more complex topics like Geometry, the kids will never stop learning. Language & Art Games: Kids will learn Nouns, Pronouns, Verbs, Adjectives, Adverbs, & other Parts of Speech, mastering grammar skills right here in the app. Typing Games: In today’s world, typing is undoubtedly an essential skill. TurtleDiary includes many keyboarding games for kids that support necessary skills while providing plenty of fun. Multiplayer Games: For the kids who like to compete & challenge their skills, our multiplayer games let them choose to play with their classmates, a friend & anyone else in the world, in a safe environment. Science Games: Our science games are sure to fulfill your child's sense of curiosity. The app offers a vast collection of science games covering such topics as the human body, weather, life cycles, animals, & much more. Geography Games: With map games, the kids will learn the Geography of the US & the World. Students will find maps of the world divided into different regions, so learning is easier, & tasks feel less overwhelming. Videos: 350+ educational videos for kids span a variety of math, science, & language arts topics. Kids will find learning videos categorized by grade level, from preschool to fifth grade. Quizzes 500+ Online quizzes offered in the app enable children from first to fifth grade to become confident in applying learned concepts & receive instant evaluations. Math Quizzes: Each topic like Addition, Subtraction, Multiplication, Division etc. divides into multiple different subtopics, progressing from easy to hard with multiple levels in between. Language & Art Quizzes: The quizzes will help kids learn Nouns, Pronouns, Verbs, Adjectives, Adverbs, Prepositions, Compound Words, Conjunctions etc. Science Quizzes: Show your child how fun science can be! The study materials cover topics like Force, Matter, Motion, Magnet, Earth’s resources, Plants, Animals, Solar System in both engaging & educational ways. Geography Quizzes: Play & Learn quiz on different topics of the world & enhance geographical skills. Typing Lessons: The app offers 3 skill levels - basic, intermediate, & advanced that include multiple lessons in each. The basic level covers touch typing skills with introduction to the QWERTY keyboard. In the intermediate level, the student learns to type basic words & simple sentences. Get started by subscribing and unlock unlimited content:- -Receive new content & games on a regular basis. -Your subscription will auto-renew yearly & your credit card will be charged via your iTunes account. You can cancel at any time from your iTunes account settings. -Annual Family Account will be charged at $69.99. -Annual Teacher Account will be charged at $199.99. -Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. You can view our Privacy Policy & Terms of Use here:- https://www.turtlediary.com/privacy-policy.html https://www.turtlediary.com/terms-&-conditions.html Important Links • Web: https://www.turtlediary.com/ • App: https://bit.ly/3wUk62l • Facebook: https://www.facebook.com/TurtleDiary • Twitter: https://twitter.com/turtlediarycom • Pinterest: https://www.pinterest.com/turtlediary/ • Youtube: https://www.youtube.com/user/turtlediarydotcom

Screenshots

TurtleDiary4 screens

Verdict

The call

The clearest difference is rating: Number Line, by MLC at 4.4 against TurtleDiary's 3.1. Number Line, by MLC also leads on review sentiment (67% vs 29%) and in-app purchases (none vs 9). TurtleDiary's advantage is update cadence (every 2 months vs every 13 months) and device support (3 vs 1). On price 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. TurtleDiary sells 9 in-app purchases, starting at $5.99 per month. 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 55 respectively. Written reviews point the same way: 67% of Number Line, by MLC's written reviews are positive against 29% of TurtleDiary's.

UpkeepUpdate frequency

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

Scorecard8 real differences · 2 level
Number Line, by MLC versus TurtleDiary: the parameters behind the verdict, then further details
ParameterNumber Line, by MLCTurtleDiary
PriceFreeFree
Rating4.4 (15 ratings) — better3.1 (55 ratings)
Positive reviews66.7% of reviews — better29.4% of reviews
Number of ratings1555 — better
Update frequencyEvery 13 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.111.0 — better
Further details — not scored
Size7 MB306 MB
Age rating4+4+
DeveloperThe Math Learning CenterTurtleDiary LLC

Customer experience

Number Line, by MLC

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

TurtleDiary

All ratings55 ratings
Positive45.5%
Neutral10.9%
Negative43.6%
Written reviews17 reviews
Positive29.4%
Neutral0.0%
Negative70.6%

In-app purchases

None

Number Line, by MLC

No in-app purchases

9 purchases

TurtleDiary

Subscriptions7
  • Turtlediary Family Monthly Subscription7 Days trial$5.991 Month
  • Turtlediary Enterprise Monthly Subscription7 Days trial$29.491 Month
  • Turtlediary Family Annual Subscription7 Days trial$49.991 Year
Show 4 more
  • Annual Parent Membership7 Days trial$69.991 Year
  • Turtlediary Enterprise Annual7 Days trial$79.991 Year
  • Turtlediary Enterprise Annual7 Days trial$189.991 Year
  • Annual Teacher Membership7 Days trial$199.991 Year
One-time2
  • Turtlediary Family Annual$69.99
  • TurtleDiary Teacher Annual$199.99

Questions

Is Number Line, by MLC free?
Number Line, by MLC is free to download, with no in-app purchases.
Is TurtleDiary free?
TurtleDiary is free to download, with in-app purchases available.
Which has better reviews, Number Line, by MLC or TurtleDiary?
Number Line, by MLC is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while TurtleDiary averages 3.1 from 55 ratings.
Do Number Line, by MLC or TurtleDiary have ads?
Neither Number Line, by MLC nor TurtleDiary shows ads.
Which is updated more often, Number Line, by MLC or TurtleDiary?
Number Line, by MLC ships an update every 13 months, and TurtleDiary every 2 months. Most recently, Number Line, by MLC was updated on November 6, 2026 and TurtleDiary on November 2, 2026.

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