Comparison

Estudylog vs Sum

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

Head to head
About

Estudylog

Organize your academic life with a study tracker and timer. Log sessions, monitor progress with visual charts, and discover your most productive study times. Designed for students seeking structure and clarity in their learning.

Highlights
  • Course organization with goal dates
  • Study timer with notes and session ratings
  • Peak study hour and day insights
  • Topic coverage tracking
  • Consistency visualization (streaks, calendar)
  • Progress charts
Features
Read full description

MASTER YOUR STUDY ROUTINE. STUDY WITH MORE CLARITY. Estudylog is a study tracker and study timer for high school, college, university, pre-med, and exam-prep students who want to organize courses, log study sessions, and understand their study habits. Track your study time by course, topic, and session type. See your streaks, calendar heat map, Peak Hours, Peak Days, and study charts in one place so you can study with more structure and less guesswork. WHY STUDENTS USE ESTUDYLOG * Study tracker built for real courses Create courses, add goal dates, final exams, key dates, and course outlines so all your studying stays organized. * Study timer with notes and session ratings Log Reading, Practice, Review, and Assignment sessions. Add notes while studying and rate each session based on focus and productivity. * Discover your Peak Hours and Peak Days Use Insights to see when you study best based on your own focus and productivity ratings. * Track topic coverage Attach sessions to course topics and see which parts of the syllabus you’ve covered and which ones still need attention. * Visualize consistency Use the contribution calendar, streaks, and study charts to see your habits over time and stay accountable. * Built for serious students Great for high school, university, college, pre-med, SAT, ACT, MCAT, LSAT, and self-directed learners who want structure, clarity, and measurable progress. FREE VS PLUS Free: Track limited sessions across up to 2 active courses. PLUS: Manage up to 100 courses and unlimited sessions. Study with more awareness, more consistency, and more intention—one session at a time. Terms of Use: https://estudylog.com/terms, 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

Estudylog4 screens
Sum4 screens

Verdict

The call

The clearest difference is rating: Sum at 5.0 against Estudylog's 4.5. Sum also leads on review sentiment (100% vs 72%). Estudylog's advantage is update cadence (every 3 days vs every 3 weeks) and ratings volume (72 vs 2). On price, ads, 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. Estudylog sells 2 in-app purchases, starting at $3.99 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 4.5. That said, the two scores are not equally well evidenced: Estudylog has 72 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 72% of Estudylog's written reviews are positive against 100% of Sum's.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
Estudylog versus Sum: the parameters behind the verdict, then further details
ParameterEstudylogSum
PriceFreeFree
Rating4.5 (72 ratings)5.0 (2 ratings) — better
Positive reviews72.0% of reviews100.0% of reviews — better
Number of ratings72 — better2
Update frequencyEvery 3 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone
Requires iOS18.018
Further details — not scored
Size81 MB3 MB
Age rating4+4+
DeveloperEstudylog inc.Nene Nakagawa

Customer experience

Estudylog

All ratings71 ratings
Positive88.7%
Neutral7.0%
Negative4.2%
Written reviews25 reviews
Positive72.0%
Neutral16.0%
Negative12.0%

Sum

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

In-app purchases

2 purchases

Estudylog

Subscriptions2
  • EstudyLog Plus-Monthly$3.991 Month
  • Estudylog Plus-Annual$24.991 Year
1 purchases

Sum

One-time1
  • Stackd Pro$1.99

Questions

Is Estudylog free?
Estudylog 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, Estudylog or Sum?
Sum is rated higher. Estudylog averages 4.5 out of 5 from 72 ratings, while Sum averages 5.0 from 2 ratings.
Do Estudylog or Sum have ads?
Neither Estudylog nor Sum shows ads.
Which is updated more often, Estudylog or Sum?
Estudylog ships an update every 3 days, and Sum every 3 weeks. Most recently, Estudylog was updated on November 8, 2026 and Sum on November 9, 2026.

Other comparisons