Comparison

Piko's Blocks vs Gem Diver

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

Head to head
About

Piko's Blocks

This app helps children aged 4+ develop spatial reasoning and 3D geometric thinking through engaging exercises. It offers over 300 unique challenges designed in cooperation with occupational therapists and teachers, with adaptive difficulty and progress monitoring.

Highlights
  • Spatial and Visual Reasoning practice
  • 3D geometric thinking development
  • Problem solving exercises
  • Suitable for ages 4+ (no reading required)
  • Over 300 unique exercises
  • Adaptive difficulty levels
  • Progress monitoring
Features
Read full description

Practice Visual-Spatial Reasoning with encouraging exercises! In Piko’s Blocks the learner builds 3D structures based on presented exercises. Player observes and manipulates self-made 3D objects to develop three-dimensional thinking. Piko’s Blocks has been developed in cooperation with occupational therapists and teachers. PLAY & LEARN: - Spatial and Visual Reasoning - 3D geometric thinking - Problem solving KEY FEATURES: - suitable for ages 4+ and doesn’t require the ability to read - does NOT include any In-App Purchases or Ad’s - over 300 unique exercises to play* - unlimited player profiles for each device: individual progress is saved* - adapts to the player’s skill level motivating and challenging appropriately* - has also an option to practice specific exercise type and difficulty level* - makes it possible to monitor the player’s progress* (* only in Premium version) EXERCISE TYPES: - building matching 3D structures - removing extra pieces from structures - building mirror images of structures - extra challenge is provided for advanced learners by point symmetry and rotation exercises* (* only in Premium version) Spatial reasoning ability is an important cognitive skill and it creates a strong basis for learning mathematical skills and STEM subjects. It is also a fundamental advantage in problem solving and creative work, since it helps to create mental visualizations of ideas and concepts. Research confirms that spatial reasoning can developed with regular practice - and this is precisely what Piko’s Blocks offers. Are you now ready for an educational adventure? Help our friend Piko on his way from planet to planet by solving 3D exercises! Let’s go, Piko is waiting! --- Creetah Ltd is a mobile game studio based in Finland. Our mission is to develop smart and efficient games for practicing cognitive skills. Close cooperation with therapists, educators and cognitive development experts is our style for crafting the best solutions. If you want to say hello to us or there’s something we should know about, you can reach us easily by email: creetah.info@gmail.com. Enjoy learning!

About

Gem Diver

A relaxing puzzle game where you connect three or more gems in a chain to clear them and reveal new ones. Progress through levels, uncover crystals, and discover what lies beneath the ocean's surface. Challenge yourself to achieve a new high score in this engaging experience.

Highlights
  • Match 3 or more gems
  • Chain reactions
  • Clear rows
  • Unlock new crystals
  • High score challenges
  • Calming atmosphere
Features
Read full description

Gem Diver - a new twist on a classic connect the dot game. Match 3 or more gems in a chain, replacing them with a new gem. Then match three more. Then keep on doing it, while the calming tones of harmonic chimes wash over you like a tropical breeze. Before you know it, you’ve cleared 40 rows of gem, and you’re in a free form, match connecting groove. Can you puzzle your way to a new high score? Uncover the next crystal? Find out what lies beneath that undersea volcano? Other free to play games may rot your mind, but Gem Diver will unlock your true potential!

Screenshots

Piko's Blocks4 screens
Gem Diver4 screens

Verdict

The call

Piko's Blocks and Gem Diver both sit at 5.0 stars, but that hides the real split: 75% of Piko's Blocks's written reviews are positive against 0% of Gem Diver's. Piko's Blocks also leads on in-app purchases (none vs 5). Gem Diver's advantage is update cadence (every 6 days vs monthly) and iOS requirement (8.0 vs 15.6). On price, rating, 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. Gem Diver sells 5 one-off in-app purchases. Piko's Blocks asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Piko's Blocks holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 6 and 6 respectively. Written reviews point the same way: 75% of Piko's Blocks's written reviews are positive against 0% of Gem Diver's.

UpkeepUpdate frequency

Piko's Blocks ships an update monthly, Gem Diver every 6 days. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
Piko's Blocks versus Gem Diver: the parameters behind the verdict, then further details
ParameterPiko's BlocksGem Diver
PriceFreeFree
Rating5.0 (6 ratings) — better4.8 (6 ratings)
Positive reviews75.0% of reviews — better0.0% of reviews
Number of ratings66
Update frequencyMonthlyEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.68.0 — better
Further details — not scored
Size72 MB221 MB
Age rating4+4+
DeveloperCreetah Ltd.MunkyFun, Inc.

Customer experience

Piko's Blocks

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

Gem Diver

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Piko's Blocks

No in-app purchases

5 purchases

Gem Diver

One-time5
  • Coin Doubler$0.99
  • Coins Pack$1.99
  • Pack of Bolts$1.99
Show 2 more
  • Remove Ads$4.99
  • Coin Doubler$4.99

Questions

Is Piko's Blocks free?
Piko's Blocks is free to download, with no in-app purchases.
Is Gem Diver free?
Gem Diver is free to download, with in-app purchases available.
Which has better reviews, Piko's Blocks or Gem Diver?
Piko's Blocks is rated higher. Piko's Blocks averages 5.0 out of 5 from 6 ratings, while Gem Diver averages 4.8 from 6 ratings.
Do Piko's Blocks or Gem Diver have ads?
Neither Piko's Blocks nor Gem Diver shows ads.
Which is updated more often, Piko's Blocks or Gem Diver?
Piko's Blocks ships an update monthly, and Gem Diver every 6 days. Most recently, Piko's Blocks was updated on November 4, 2026 and Gem Diver on November 2, 2026.

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