Comparison

Pearl Diver vs Interactive Number Line

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

Head to head
About

Pearl Diver

Dive into the ocean to master the number line, including fractions and decimals, by collecting pearls. This educational game is designed by experts to align with Common Core standards for grades 3-8.

Highlights
  • Number line mastery
  • Fractions and decimals
  • Common Core alignment
  • Progress tracking
  • Educational game design
Features
Read full description

Throw on your diving helmet, and head into the depths of the sea! Master the number line, including fractions and decimals, while gathering beautiful pearls. Will you find the elusive black pearl? • Ideal for elementary and middle school students, grades 3-8. Developed by mathematics educators, researchers, and game developers at the Learning Games Lab at New Mexico State University. Games developed by the Learning Games Lab undergo a rigorous instructional design process, extensive user testing, and input from learners, teachers, and researchers. Pearl Diver addresses Common Core standards relevant to the number line and properties of numbers, including: • Understanding numbers, ways of representing numbers, and number systems. • Understanding and representing commonly used fractions. • Understanding fractions as part of unit wholes and as locations on number lines. • Comparing and ordering fractions, and finding their approximate locations on the number line. Read about research documenting learning effectiveness of Math Snacks: http://mathsnacks.com/research.html Pearl Diver was developed as part of the "Math Snacks" initiative. Other free animations, activities, and games are available through the Math Snacks web site at http://mathsnacks.org. Math Snack materials were developed with support from the National Science Foundation (0918794 & 1503507). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Some materials were originally prototyped or discussed as part of a cooperative agreement from the U.S. Department of Education (U295A050004).

About

Interactive Number Line

Features
Read full description

The Interactive Number Line is a learning tool that provides practice in several important areas of the elementary school math curriculum. Skills: Counting and Patterns Addition Subtraction Fractions Decimals Percents Integers When using the app students are prompted to find a specific number on the number line by sliding a marker to the correct position. Skills required involve: counting in patterns, adding and subtracting one and two digit numbers, equivalent fractions, ordering decimals and percents, locating positive and negative integers on a number line. Problem sets are randomly generated so the app presents a unique experience each time it is used. The Interactive Number Line is a great tool for teacher lead classroom presentations and also individual student use.

Screenshots

Pearl Diver4 screens

Verdict

The call

The clearest difference is price: Pearl Diver at Free against Interactive Number Line's $0.99. Interactive Number Line's advantage is iOS requirement (12.0 vs 17.6). On update cadence, ads, in-app purchases and device support 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

Pearl Diver is free to download; Interactive Number Line costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Pearl Diver ships an update every 20 months, Interactive Number Line every 35 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 8 level
Pearl Diver versus Interactive Number Line: the parameters behind the verdict, then further details
ParameterPearl DiverInteractive Number Line
PriceFree — better$0.99
Rating5.0 (2 ratings) — better—
Positive reviews76.2% of reviews—
Number of ratings2 — better—
Update frequencyEvery 20 months — betterEvery 35 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPad, Apple TV
Requires iOS17.612.0 — better
Further details — not scored
Size28 MB20 MB
Age rating4+4+
DeveloperNew Mexico State University Board of RegentsVentura Educational Systems

In-app purchases

None

Pearl Diver

No in-app purchases

None

Interactive Number Line

No in-app purchases

Questions

Is Pearl Diver free?
Pearl Diver is free to download, with no in-app purchases.
Is Interactive Number Line free?
Interactive Number Line costs $0.99, with no in-app purchases.
Do Pearl Diver or Interactive Number Line have ads?
Neither Pearl Diver nor Interactive Number Line shows ads.
Which is updated more often, Pearl Diver or Interactive Number Line?
Pearl Diver ships an update every 20 months, and Interactive Number Line every 35 months. Most recently, Pearl Diver was updated on November 1, 2026 and Interactive Number Line on October 26, 2026.

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