Comparison

Study Time With Rain vs Sum

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

Head to head
About

Study Time With Rain

Enhance your study sessions with a charming ghost companion and a variety of timer options. Track your progress, enjoy a curated song library, and set motivational countdowns for your academic goals.

Highlights
  • Cute ghost characters
  • Pomodoro & Primary Timer
  • Study statistics tracking
  • Song library for ambiance
  • Personal confidence & D-Day settings
Features
Read full description

Study ghost app on rainy days! Do you like studying on rainy days? Then this app is perfect! This is a special study friend. It has the following characteristics: **Cute ghost characters**: Our little ghost makes your study time more attractive as you focus on your studies. **Pomodoro & Primary Timer**: Whether you prefer the Pomodoro technique or want a regular timer, it's all on offer. **Statistics of study** Keep track of your study progress and gain insight into your study habits. **Song Library** Set the tone with songs to cheer up or enjoy the rain by studying. Personal Confidence & D-Day Settings Set a countdown for personal messages or special study goals for motivation you need Add a magical touch to your study routine. Study Rainy Days Make rainy days productive every time with the ghost app! **Study ghost app on rainy days!** Do you like studying on rainy days? Then this app is perfect! This is a special study friend. It has the following characteristics: **Cute ghost characters**: Our little ghost makes your study time more attractive as you focus on your studies. **Pomodoro & Primary Timer**: Whether you prefer the Pomodoro technique or want a regular timer, it's all on offer. **Statistics of study** Keep track of your study progress and gain insight into your study habits. **Song Library** Set the tone with songs to cheer up or enjoy the rain by studying. Personal Confidence & D-Day Settings Set a countdown for personal messages or special study goals for motivation you need Add a magical touch to your study routine. Make every rainy day productive with the Study Ghost app! [Music Copyright] ⓒ 2023 한국저작권위원회 [도서관에서 공부하는 소리] ⓒ 2023 김용배 [도시 밤 앰비언스2] ⓒ 2023 (재)전주정보문화산업진흥원 [주거_펜션_저녁_공간음_비내리는_MKH418_ST_192] +(Royalty Free sound) Terms of Use: 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

Study Time With Rain4 screens
Sum4 screens

Verdict

The call

The clearest difference is ratings volume: Study Time With Rain at 789 against Sum's 2. Study Time With Rain also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18). Sum's advantage is rating (5.0 vs 4.8) and review sentiment (100% vs 91%). On price, update cadence, ads and in-app purchases 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. Study Time With Rain sells 10 in-app purchases, starting at $5.99 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 4.8. That said, the two scores are not equally well evidenced: Study Time With Rain has 789 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 91% of Study Time With Rain's written reviews are positive against 100% of Sum's.

UpkeepUpdate frequency

Study Time With Rain ships an update every 4 weeks, Sum every 3 weeks. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

Scorecard5 real differences · 5 level
Study Time With Rain versus Sum: the parameters behind the verdict, then further details
ParameterStudy Time With RainSum
PriceFreeFree
Rating4.8 (789 ratings)5.0 (2 ratings) — better
Positive reviews91.3% of reviews100.0% of reviews — better
Number of ratings789 — better2
Update frequencyEvery 4 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18
Further details — not scored
Size93 MB3 MB
Age rating4+4+
DeveloperYoonjik ChoNene Nakagawa

Customer experience

Study Time With Rain

All ratings788 ratings
Positive94.8%
Neutral2.0%
Negative3.2%
Written reviews80 reviews
Positive91.3%
Neutral5.0%
Negative3.8%

Sum

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

Bugs and requests

Study Time With Rain

Reported bugs

3 issues
  • Time tracking issues, inaccurate recording of study time
  • Black screen bug
  • Pen function noise removed

Requested features

5 requests
  • More customization options (colors, animations, etc.)
  • Ability to earn in-app currency for premium features
  • Seamless background playback of music and timer
  • Dark mode
  • Countdown timer with custom alerts

Sum

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Study Time With Rain

Subscriptions1
  • Premium 1 Month$5.991 Month
One-time9
  • White Cat$0.59
  • Black Cat$0.59
  • Glasses$0.79
Show 6 more
  • Blackboard$0.99
  • Window Mountain$1.29
  • Window Snowman$1.29
  • Window Mountain Dark Version$1.29
  • Cherry Blossom$1.29
  • Premium Lifetime$27.99
1 purchases

Sum

One-time1
  • Stackd Pro$1.99

Questions

Is Study Time With Rain free?
Study Time With Rain 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, Study Time With Rain or Sum?
Sum is rated higher. Study Time With Rain averages 4.8 out of 5 from 789 ratings, while Sum averages 5.0 from 2 ratings.
Do Study Time With Rain or Sum have ads?
Neither Study Time With Rain nor Sum shows ads.
Which is updated more often, Study Time With Rain or Sum?
Study Time With Rain ships an update every 4 weeks, and Sum every 3 weeks. Most recently, Study Time With Rain was updated on November 7, 2026 and Sum on November 9, 2026.

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