Comparison

Study Time Record chart vs Stackd

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

Head to head
About

Study Time Record chart

Features
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Press the study button and record the start date and time. You can record the end date and time by clicking "Record end date and time" in the table. Study time is calculated and displayed based on the start date and time and end date and time. Display study time in a line graph. ・Record the start date and time of study 1. Tap the "Study" button. If you press/tap for a long time, step 2/step 3 will be skipped. The current date and time will be set. 2. Select the year, month, and day and tap "Next". 3. Select a start time and tap OK. ・When recording the end date and time 1. Tap the "End date and time" button in the end date and time column of the table. If you long press/tap, step 2/step 3 will be skipped. The current date and time will be set. 2. Select the year, month, and day and tap "Next". 3. Select the end time and tap "OK". ▼ Sorting order You can change the sort order of the table by tapping the arrows (↓↑) to the left of the year and month. ▼Study time The study time in the table is automatically displayed based on the start date and time and end date and time. ▼Record subjects 1. Tap "Select subject" in the mood column at the end of the table. 2. Select a subject. 3. If there are no subjects to select  Tap “Subject List Settings”.   Tap the “Add subject button” to add a subject.  Return to steps 1 and 2 and record the subjects. ▼Enter notes 1. Tap the three points (...) on the table. 2. Tap Notes. 3. Enter the notes and tap OK. ▼Delete one record 1. Tap the three points (...) on the table. 2. Tap Delete from the menu. 3. Tap the red delete button. ▼Course list settings Create a subject list for each user using the subject list settings. Configure settings such as adding, deleting, and sorting subjects. ▼Set start time (top right menu) Set the time input by setting the start time. ▼Setting the end time (top right menu) Set the time input in the end time setting. ▼Create PDF file (top right menu) Create a PDF file. You can create a PDF file that specifies the year and month and includes the start date and time, end date and time, study time, subjects, and notes. If you want to print, please share the PDF file to an app that can print before printing. ▼Dark mode (top right menu) Select dark mode ON/OFF from the menu on the top right Press Dark Mode to switch to a screen display with a color scheme based on black. If you press Light mode, the screen will be displayed in the normal white color. ▼If you want to delete all records Delete all data from the top right menu You can delete all records below. ・Delete all recorded data (study time, subjects, users) ・Delete all recorded data on iCloud ▼Display graph 1. Press the line graph button at the top. 2. Click the displayed graph from the menu below. Monthly graph study time graph Study time rhythm chart Annual total/average/graph Full period graph ▼Add user 1. Press the user button at the top 2. Press add user 3. Enter your username and press OK. ▼Edit username 1. Press the user button at the top 2. Press user edit and delete 3. Press the username from the list. 4. Edit the user name on the edit screen and press OK. ▼Delete username 1. Press the user button at the top 2. Press user edit and delete 3. Swipe the username you want to delete from the list from the left and press Delete. ・Model change data migration For users with the same Apple ID Because records are stored in iCloud View the same recording on a new iPhone/iPad 【Terms of Use】 This app complies with the Apple Standard Terms of Use (EULA). Please refer to the link below for details: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stackd

Features
Read full description

This is a simple study timer app that allows you to record and manage your study time by subject. Simply measure your time with the timer and save it. You can also log sessions manually or add entries for past dates. You can record everything together, including subjects, study materials, pages, and notes. You can view the big picture of your studies by checking your subject balance with weekly graphs and reviewing your progress streaks on the calendar. No ads, no social media features, and no account registration required. All data is saved on your device, so there are no privacy concerns. Perfect for anyone who wants to focus on learning, from exam preparation to certifications and language studies. [Main Features] - 3 timer modes (Stopwatch, Countdown, Pomodoro) - Management of subjects, materials, pages, and notes - Weekly graphs to check subject balance (bar chart & donut chart) - Calendar to visualize study days with color-coding - Display of consecutive study days (streaks) - Daily study reminder - Backup and data export functions [Stackd Pro (One-time purchase)] - Monthly graphs and cumulative line graphs - Setting weekly goals and checking achievement rates - 9 color themes - Home screen and lock screen widgets

Screenshots

Study Time Record chart4 screens
Stackd4 screens

Verdict

The call

The clearest difference is in-app purchases: Study Time Record chart at none against Stackd's 1. Stackd's advantage is ads (none vs shown) and update cadence (fortnightly vs every 2 months). On price, device support 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

Both are free to download. Stackd sells 1 one-off in-app purchase. Study Time Record chart asks for nothing beyond the download.

UpkeepUpdate frequency

Study Time Record chart ships an update every 2 months, Stackd fortnightly. The most recent releases landed on September 15, 2026 and September 14, 2026 respectively.

Scorecard3 real differences · 3 level
Study Time Record chart versus Stackd: the parameters behind the verdict, then further details
ParameterStudy Time Record chartStackd
PriceFreeFree
Update frequencyEvery 2 monthsFortnightly — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.6 — better18
Further details — not scored
Size7 MB3 MB
Age rating17+4+
DeveloperYUTAKA IZUMIYAMANene Nakagawa

In-app purchases

None

Study Time Record chart

No in-app purchases

1 purchases

Stackd

One-time1
  • Stackd Pro$1.99

Questions

Is Study Time Record chart free?
Study Time Record chart is free to download, with no in-app purchases.
Is Stackd free?
Stackd is free to download, with in-app purchases available.
Do Study Time Record chart or Stackd have ads?
Study Time Record chart shows ads; Stackd does not.
Which is updated more often, Study Time Record chart or Stackd?
Study Time Record chart ships an update every 2 months, and Stackd fortnightly. Most recently, Study Time Record chart was updated on September 15, 2026 and Stackd on September 14, 2026.

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