Comparison

Serum X vs Hard Math Riddles

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

Head to head
About

Serum X

Uncover a revolutionary serum before it's misused. Employ detective skills in this point-and-click adventure to locate its hidden storage. Navigate a world of scientific progress and industrial change to secure the future.

Highlights
  • Detective gameplay
  • Point-and-click mechanics
  • Room escape puzzles
  • Story-driven adventure
  • Scientific advancements theme
Features
Read full description

A game changer serum has been developed with the power to change the 20th century. Retrieve it before it falls in the wrong hands. Use your detective skills, sneak in and find where the serum is stored in this point-and-click / room escape game. With all the scientific advancements and the industrial revolution, all sorts of experiments are flourishing everywhere. The appliance of this experiments will define the future..

About

Hard Math Riddles

Features
Read full description

Hard Math Riddle is the ultimate logic game for players who crave a genuine IQ test. If you are looking for hard math puzzles that demand analytical reason and sharp logic, you have found your challenge. This isn't just simple arithmetic; it is a collection of 100 hand-crafted math riddles designed to push your logical riddle-solving skills to the absolute limit. MASTER ANALYTICAL REASONING Every level in this game is a unique brain teaser inspired by professional IQ tests and hard math problems. You won't find filler or guesswork here. Each puzzle presents a complex math puzzle where you must decode numerical sequences, identify hidden patterns, and solve for the missing number within intricate logical systems. To succeed, you must apply deep analytical reasoning and treat each question like a scientific experiment. THE "GIVE UP" SYSTEM: LEARN THE LOGIC We believe a great logic game should be a learning experience. Unlike other math riddles that leave you frustrated, our "Give Up" button does more than just reveal the answer. It provides a detailed walkthrough that explains the exact logic used to solve the riddle. This turns every hard math challenge into a lesson in analytical reasoning, ensuring you understand the pattern and sharpen your problem-solving skills for the next logical riddle. KEY FEATURES 100 ELITE LEVELS: Experience 100 masterfully designed math puzzles that transition from challenging warm-ups to "stump the expert" enigmas. Each one is a rigorous IQ test for your brain. PURE LOGICAL DEDUCTION: No simple algebra. Every math riddle requires you to analyze the relationship between numbers to find the missing link. It is analytical reasoning at its finest. SMART SOLUTIONS: Our 'Give Up' system explains the "how" and "why," helping you improve your math puzzle IQ with every attempt. It turns a hard math game into a brain-training seminar. SCIENTIFIC BRAIN TRAINING Engaging with hard math puzzles and logic games is a proven way to improve memory power, heighten focus, and develop the mental speed necessary for high-level IQ tests. Our riddles provide a systematic mental workout for adults and intellectual students who appreciate the beauty of a well-constructed mathematical problem. HOW TO PLAY ANALYZE the relationship between the numbers in each math puzzle. DEDUCE the pattern or logical riddle rule governing the sequence. ENTER the correct numerical answer to unlock the next level. USE the solution button to learn the logic if a hard math problem stumps you. Download Hard Math Riddle - Logic Game today. Challenge your brain with the toughest math riddles on the store, master the analytical reasoning required to solve them, and join the elite few who can conquer all 100 levels. Your free time is your most valuable asset. Make it meaningful with the ultimate IQ test and math puzzle experience.

Screenshots

Serum X4 screens
Hard Math Riddles4 screens

Verdict

The call

The clearest difference is ads: Serum X at none against Hard Math Riddles's shown. Serum X also leads on iOS requirement (10.3 vs 15.0). Hard Math Riddles's advantage is update cadence (every 2 days vs every 4 months). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Serum X ships an update every 4 months, Hard Math Riddles every 2 days. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Serum X versus Hard Math Riddles: the parameters behind the verdict, then further details
ParameterSerum XHard Math Riddles
PriceFreeFree
Rating1.6 (5 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 4 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better15.0
Further details — not scored
Size99 MB32 MB
Age rating4+4+
DeveloperJose LopezSEEK YOUR WAY OUT

In-app purchases

None

Serum X

No in-app purchases

None

Hard Math Riddles

No in-app purchases

Questions

Is Serum X free?
Serum X is free to download, with no in-app purchases.
Is Hard Math Riddles free?
Hard Math Riddles is free to download, with no in-app purchases.
Do Serum X or Hard Math Riddles have ads?
Hard Math Riddles shows ads; Serum X does not.
Which is updated more often, Serum X or Hard Math Riddles?
Serum X ships an update every 4 months, and Hard Math Riddles every 2 days. Most recently, Serum X was updated on October 10, 2026 and Hard Math Riddles on October 25, 2026.

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