Comparison

StudyLog vs Sum

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

Head to head
About

StudyLog

Effortlessly track your study sessions and exam preparation with a focus on speed and simplicity. Features include instant recording, goal setting, and visual progress tracking. Enjoy cloud backup and customization options for a distraction-free learning experience.

Highlights
  • Instant study session recording
  • Automatic time tracking by subject
  • Study streak tracking
  • Customizable study goals
  • Calendar and heatmap visualizations
  • Home screen widget
  • Secure cloud backup
Features
Read full description

StudyLog is a simple, fast study tracker for recording study time and building consistent learning habits. Use it for school, exams, certifications, language learning, or any daily study routine. Start a session in one tap, track time by subject, and see today’s progress, streaks, and goals at a glance. Calendar views, yearly heatmaps, and subject statistics make it easy to review your effort and stay motivated. Key features • Study time tracking by subject • Fast study timer • Daily, weekly, and monthly goals • Study streaks • Calendar and yearly heatmap • Subject statistics and charts • Home Screen widgets • Calendar sync: add newly saved study records to your iPhone Calendar as events (turn on in Settings) • Live Activity: see your running stopwatch on the Lock Screen and in the Dynamic Island • iCloud backup and sync • 32 color themes Perfect for • Students tracking study hours • Exam and certification preparation • Building a daily study habit • Anyone who wants a clean, focused study timer • Reviewing progress with calendars and statistics Your study data stays on your device and can sync with iCloud. Download StudyLog and turn your daily study effort into visible progress. Terms of Use This app follows Apple’s standard End User License Agreement (EULA). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sum

Track and manage your study time by subject with a simple timer. Log sessions, add notes, and visualize your progress with weekly graphs and a calendar. Focus on learning without distractions.

Highlights
  • Study time tracking
  • Subject and material logging
  • Weekly progress graphs
  • Calendar visualization
  • Study streaks
  • Pomodoro timer
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 - Real-time timer display on the Lock Screen

Screenshots

StudyLog4 screens
Sum4 screens

Verdict

The call

The clearest difference is review sentiment: Sum at 100% against StudyLog's 50%. Sum also leads on rating (5.0 vs 4.2) and ads (none vs shown). StudyLog's advantage is ratings volume (6 vs 2). On price, update cadence, in-app purchases and monetization model 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. StudyLog sells 2 in-app purchases, starting at $2.99 per month and Sum sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sum holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 50% of StudyLog's written reviews are positive against 100% of Sum's.

UpkeepUpdate frequency

StudyLog ships an update every 10 days, Sum every 3 weeks. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

Scorecard4 real differences · 6 level
StudyLog versus Sum: the parameters behind the verdict, then further details
ParameterStudyLogSum
PriceFreeFree
Rating4.2 (6 ratings)5.0 (2 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings6 — better2
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.6 — better18
Further details — not scored
Size10 MB3 MB
Age rating4+4+
DeveloperBYNETNene Nakagawa

Customer experience

StudyLog

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Sum

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

StudyLog

Subscriptions2
  • Premium Monthly$2.991 Month
  • Premium Yearly$14.991 Year
1 purchases

Sum

One-time1
  • Stackd Pro$1.99

Questions

Is StudyLog free?
StudyLog is free to download, with in-app purchases available.
Is Sum free?
Sum is free to download, with in-app purchases available.
Which has better reviews, StudyLog or Sum?
Sum is rated higher. StudyLog averages 4.2 out of 5 from 6 ratings, while Sum averages 5.0 from 2 ratings.
Do StudyLog or Sum have ads?
StudyLog shows ads; Sum does not.
Which is updated more often, StudyLog or Sum?
StudyLog ships an update every 10 days, and Sum every 3 weeks. Most recently, StudyLog was updated on November 8, 2026 and Sum on November 9, 2026.

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