Comparison

Complex Memory Trainer vs Hidden Blocks

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

Head to head
About

Complex Memory Trainer

Features
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Complex Memory Trainer is an application for memory training. You can see the objects (numbers, letters or colors) on the screen for a few seconds. You need to remember them. After the disappearance you must specify the location of objects in the order shown on the top of the screen. The program includes multiple difficulty levels in each of the categories.

About

Hidden Blocks

Features
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How many blocks? Look again. Some blocks are in plain sight. Others hide behind the stack. HIDDEN BLOCKS is a 3D block-counting logic puzzle where the real challenge is figuring out what you can't see. Study the stack, picture the hidden layers, and choose your answer. Simple to understand. Surprisingly tricky to solve. ▣ TWO MODES. TWO WAYS TO THINK. ● Count All Blocks Work out the total number of blocks, including the ones hidden from view. Every layer counts. ● Find Hidden Blocks Count only the blocks you can't see. Look beyond the visible faces and imagine what completes the stack. ▣ SMALL STACKS. BIG AHA MOMENTS. Start with simple shapes and progress to trickier, multi-layer structures. Use spatial reasoning to work out each answer. That satisfying moment when the whole stack makes sense? That's the fun. ▣ A FRESH PUZZLE EVERY DAY Daily Blocks gives you a new challenge each day. Take on the same daily puzzle as other players and see how your solve time compares. ▣ JUST FEEL LIKE A PUZZLE? Practice serves up a random puzzle each time. No stars, records, or rankings. Warm up before a stage or enjoy another little challenge. ▣ HOW FAR CAN YOU GO? Solve within the time limit, earn stars, and keep moving through the stages. Compare your stage progress with players around the world on the global leaderboard. ▣ A NOTEBOOK FULL OF PERSONALITY Warm paper, blue-ink answer marks, and three playful block companions give each challenge a little character. Clean puzzle layouts keep the focus on the blocks, while the Cubie trio brings the celebrations. Enjoy logic puzzles, visual brain teasers, or number challenges? Discover a different kind of block puzzle: count the stack and imagine what lies out of sight. ▣ WHERE THE IDEA CAME FROM Counting stacked unit cubes is a classic spatial reasoning exercise found in math curricula around the world — Common Core in the US, Singapore Math, the UK National Curriculum, and more. It trains the same 3D thinking that engineers, architects, and pilots use every day. HIDDEN BLOCKS takes that proven concept off the classroom page and turns it into a competitive daily brain game. There's more to every stack than meets the eye. #brain_training #spatial_reasoning #block_puzzle #logic_game #unit_cubes #3D_thinking #IQ #math_puzzle #puzzle_game #brain_game #hidden_blocks #casual_game #mind_game #focus #cube #counting #visual_puzzle #logic_puzzle #mental_training #block_counting

Screenshots

Complex Memory Trainer4 screens
Hidden Blocks4 screens

Verdict

The call

The clearest difference is in-app purchases: Complex Memory Trainer at none against Hidden Blocks's 8. Complex Memory Trainer also leads on iOS requirement (8.1 vs 15.0). Hidden Blocks's advantage is update cadence (weekly vs every 16 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. Hidden Blocks sells 8 one-off in-app purchases. Complex Memory Trainer asks for nothing beyond the download.

UpkeepUpdate frequency

Complex Memory Trainer ships an update every 16 months, Hidden Blocks weekly. The most recent releases landed on September 16, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 3 level
Complex Memory Trainer versus Hidden Blocks: the parameters behind the verdict, then further details
ParameterComplex Memory TrainerHidden Blocks
PriceFreeFree
Update frequencyEvery 16 monthsWeekly — better
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.1 — better15.0
Further details — not scored
Size65 MB86 MB
Age rating4+4+
DeveloperRuslan GoncharenkoLogan Land

In-app purchases

None

Complex Memory Trainer

No in-app purchases

8 purchases

Hidden Blocks

One-time8
  • 10 Gems$0.99
  • 20 Gems$1.99
  • Unlimited Play · 3 Hours$2.99
Show 5 more
  • 50 Gems$4.99
  • Unlimited Play · 24 Hours$6.99
  • 125 Gems$9.99
  • 250 Gems$19.99
  • 700 Gems$49.99

Questions

Is Complex Memory Trainer free?
Complex Memory Trainer is free to download, with no in-app purchases.
Is Hidden Blocks free?
Hidden Blocks is free to download, with in-app purchases available.
Do Complex Memory Trainer or Hidden Blocks have ads?
Both Complex Memory Trainer and Hidden Blocks show ads.
Which is updated more often, Complex Memory Trainer or Hidden Blocks?
Complex Memory Trainer ships an update every 16 months, and Hidden Blocks weekly. Most recently, Complex Memory Trainer was updated on September 16, 2026 and Hidden Blocks on October 1, 2026.

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