Pearl Diver vs Interactive Number Line
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Number line mastery
- Fractions and decimals
- Common Core alignment
- Progress tracking
- Educational game design
Read full descriptionHide 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).
Interactive Number Line
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | Pearl Diver | Interactive Number Line |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 76.2% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 20 months — better | Every 35 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPad, Apple TV |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | New Mexico State University Board of Regents | Ventura Educational Systems |
In-app purchases
Pearl Diver
No in-app purchases
Interactive Number Line
No in-app purchases
Questions
Is Pearl Diver free?
Is Interactive Number Line free?
Do Pearl Diver or Interactive Number Line have ads?
Which is updated more often, Pearl Diver or Interactive Number Line?
Other comparisons















