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.
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.
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.
- Record study time by subject
- Register and manage subjects
- View study history with graphs
- Visualize time spent on weak subjects
- Ad-supported free usage
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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
Verdict
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
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.
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.
| Parameter | Size test | Study Timer & Time Tracker |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 4.3 (25 ratings) — better |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | — | 25 — better |
| Update frequency | Every 10 months | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Ad-supported |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 14.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 1 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Viacheslav Romanenko | WEBDIA INC. |
In-app purchases
Size test
No in-app purchases
Study Timer & Time Tracker
- Remove Ads$2.99
Questions
Is Size test free?
Is Study Timer & Time Tracker free?
Do Size test or Study Timer & Time Tracker have ads?
Which is updated more often, Size test or Study Timer & Time Tracker?
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