Comparison

Size test vs Memorix

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

Head to head
About

Size test

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This app is designed to assess how quickly the user reacts to changes in the size of an object. Users can select one of the test modes: 'Increasing the object', 'Decreasing the object', 'Decreasing or increasing the object'. When the user observes a change in the size of an object, the user must break contact with the device screen. The recorded test time reflects the user's ability to perceive the change in object size. Once the test is completed, the results are tested for normality of distribution (Shapiro-Wilk test). If the values deviate from the law of normal distribution, the program analyzes the data sets, removes the worst value and adds an additional attempt. In the program settings you can select the number of attempts - from 10 to 30. The choice of the number of attempts depends on the performer's age and professional activity. In addition, in the program settings the user can save a backup copy of his measurements in JSON format anywhere (Save backup), add measurements from another device (Add backup), replace already saved measurements with new ones (Replace backup) or delete all data (Delete all data). This application is intended to be used by athletes and teachers in specialized educational institutions for scientific research.

About

Memorix

Assess and improve your memory with a variety of classic psychological tests and daily workouts. Track your progress, compare your scores to averages, and learn memory techniques. This app offers a private and offline experience for continuous brain training.

Highlights
  • 13 classic memory tests and games
  • Daily 3-test workout routine
  • Memory profile and score tracking
  • Comparison to age group averages
  • Memory technique guides
  • Offline functionality
  • Private, no account required
Features
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How good is your memory? Memorix is a memory test you can take in minutes and a memory workout you can keep up every day. It is built on 13 classic memory tests, the same kinds of tasks psychologists use to measure memory. 13 MEMORY TESTS AND GAMES • Digit Span Forward, Backward and Sequencing: the classic number memory test • Spatial Memory: tap the blocks in the order they lit up (the Corsi block-tapping task) • Color Sequence and Sequence of Sounds: repeat a growing sequence by sight or by ear • Word Memory, Image Memory and Visual Pairs: words, pictures and the pairs they form • Speed Recall: a number flashes for a moment, then you type it back against the clock • Pattern Recall, Number Chain (n-back) and Face & Name: three advanced tests A DAILY 3-TEST WORKOUT Every day Memorix picks three tests for you. Keep your streak going, and turn on one daily reminder at the time you choose. SEE WHERE YOU STAND • Your Memorix score from 0 to 1000, and a memory profile across five kinds of memory: short-term, working, spatial, verbal and associative • Your digit span and Corsi span compared with published averages for your age group: see the top percent you are in • Levels that rise with you in every test • History charts and personal bests for every test • A share card for your results, and 12 achievements • Seven short guides to proven memory techniques: chunking, the memory palace, spaced repetition and more PRIVATE AND CALM • No account and no sign-up. Your results and your age range stay on your phone • Every test works without an internet connection • 19 languages, light and dark mode, phone and tablet Take your first memory test now and find your memory span. MEMORIX PRO Unlock everything with one purchase. No subscription. Memorix is for memory training and self-assessment. It is not a medical device and does not diagnose any condition.

Screenshots

Memorix4 screens

Verdict

The call

The clearest difference is price: Memorix at Free against Size test's $0.99. Memorix also leads on update cadence (every 2 months vs every 10 months) and device support (3 vs 1). Size test's advantage is in-app purchases (none vs 1). On ads and iOS requirement 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

Memorix is free to download; Size test costs $0.99 up front. Memorix sells 1 one-off in-app purchase. Size test asks for nothing beyond the download.

UpkeepUpdate frequency

Size test ships an update every 10 months, Memorix every 2 months. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

Scorecard4 real differences · 6 level
Size test versus Memorix: the parameters behind the verdict, then further details
ParameterSize testMemorix
Price$0.99Free — better
Rating—3.2 (5 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 10 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size1 MB68 MB
Age rating4+4+
DeveloperViacheslav RomanenkoGunawan Santoso

In-app purchases

None

Size test

No in-app purchases

1 purchases

Memorix

One-time1
  • Memorix Pro$6.99

Questions

Is Size test free?
Size test costs $0.99, with no in-app purchases.
Is Memorix free?
Memorix is free to download, with in-app purchases available.
Do Size test or Memorix have ads?
Neither Size test nor Memorix shows ads.
Which is updated more often, Size test or Memorix?
Size test ships an update every 10 months, and Memorix every 2 months. Most recently, Size test was updated on November 11, 2026 and Memorix on November 9, 2026.

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