Comparison

Pearl Diver vs Missing Numbers Minds

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

Missing Numbers Minds

Features
Read full description

Improve your mind skill finding out the missing number. Choose the up to 10 levels: Easy, Medium, Hard , ( linear, recurrence or both ) or Random. Push START- Time Up or Time Down Guess the missing numbers to get points. Higher Level , more points. Ideal for kinds and people who need to exercise their brain. Very easy to use. Donations for App maintenance welcome. Thanks.

Screenshots

Pearl Diver4 screens
Missing Numbers Minds4 screens

Verdict

The call

The clearest difference is in-app purchases: Pearl Diver at none against Missing Numbers Minds's 2. Pearl Diver also leads on iOS requirement (17.6 vs 26.1). Missing Numbers Minds's advantage is update cadence (every 5 months vs every 20 months). On price, ads 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

Both are free to download. Missing Numbers Minds sells 2 one-off in-app purchases. Pearl Diver asks for nothing beyond the download.

UpkeepUpdate frequency

Pearl Diver ships an update every 20 months, Missing Numbers Minds every 5 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
Pearl Diver versus Missing Numbers Minds: the parameters behind the verdict, then further details
ParameterPearl DiverMissing Numbers Minds
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews76.2% of reviews—
Number of ratings2 — better—
Update frequencyEvery 20 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better26.1
Further details — not scored
Size28 MB4 MB
Age rating4+4+
DeveloperNew Mexico State University Board of RegentsJuan Fullana

In-app purchases

None

Pearl Diver

No in-app purchases

2 purchases

Missing Numbers Minds

One-time2
  • Donation for maintenance.$0.99
  • Extra for develop and maintenance$0.99

Questions

Is Pearl Diver free?
Pearl Diver is free to download, with no in-app purchases.
Is Missing Numbers Minds free?
Missing Numbers Minds is free to download, with in-app purchases available.
Do Pearl Diver or Missing Numbers Minds have ads?
Neither Pearl Diver nor Missing Numbers Minds shows ads.
Which is updated more often, Pearl Diver or Missing Numbers Minds?
Pearl Diver ships an update every 20 months, and Missing Numbers Minds every 5 months. Most recently, Pearl Diver was updated on November 1, 2026 and Missing Numbers Minds on October 26, 2026.

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