Comparison

Size test vs Study Timer & Time Tracker

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

Head to head
About

Size test

Read full description

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

Study Timer & Time Tracker

Easily track your daily study sessions and visualize your progress with detailed history charts. This app helps you identify subjects needing more attention, encouraging balanced learning for improved academic performance.

Highlights
  • Record study time by subject
  • Register and manage subjects
  • View study history with graphs
  • Visualize time spent on weak subjects
  • Ad-supported free usage
Read full description

This is an app that allows you to record study time and check the history with pie charts and stacked bar graphs. - Counting study time The app counts. Select a subject, set the study time, and count to record study time. If you close the app or perform other operations while studying, the count will be interrupted. - Register subjects By registering subjects, you can record which subjects you studied. By recording each subject, you can understand which subjects you do not have enough study time. - Study history Displays daily study time in a stacked bar graph. Recheck your study time by looking at your past history. If you do not have enough study time, make sure to set aside time for studying. - Advertisement This app is free to use, but ads are displayed. To avoid interrupting your studies, ads are displayed only after the countdown is completed so as not to break your concentration. - Purpose of this app This app was created for children who tend to study only in the subjects they are good at. The study time for subjects you are weak at tends to be short. By visualizing the time you study, you can understand the lack of study time for subjects you are weak at. I hope this will lead to improved grades for everyone.

Screenshots

Study Timer & Time Tracker3 screens

Verdict

The call

The clearest difference is price: Study Timer & Time Tracker at Free against Size test's $0.99. Study Timer & Time Tracker also leads on update cadence (every 4 days vs every 10 months). Size test's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Study Timer & Time Tracker is free to download; Size test costs $0.99 up front. Study Timer & Time Tracker 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, Study Timer & Time Tracker every 4 days. The most recent releases landed on May 19, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 5 level
Size test versus Study Timer & Time Tracker: the parameters behind the verdict, then further details
ParameterSize testStudy Timer & Time Tracker
Price$0.99Free — better
Rating—4.3 (25 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings—25 — better
Update frequencyEvery 10 monthsEvery 4 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Ad-supported
DevicesiPadiPhone, iPad — better
Requires iOS14.0 — better16.6
Further details — not scored
Size1 MB35 MB
Age rating4+4+
DeveloperViacheslav RomanenkoWEBDIA INC.

In-app purchases

None

Size test

No in-app purchases

1 purchases

Study Timer & Time Tracker

One-time1
  • Remove Ads$2.99

Questions

Is Size test free?
Size test costs $0.99, with no in-app purchases.
Is Study Timer & Time Tracker free?
Study Timer & Time Tracker is free to download, with in-app purchases available.
Do Size test or Study Timer & Time Tracker have ads?
Study Timer & Time Tracker shows ads; Size test does not.
Which is updated more often, Size test or Study Timer & Time Tracker?
Size test ships an update every 10 months, and Study Timer & Time Tracker every 4 days. Most recently, Size test was updated on May 19, 2026 and Study Timer & Time Tracker on September 24, 2026.

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