Comparison

Korean vocabulary, TOPIK words vs Study Timer Study Rainbow

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

Head to head
About

Korean vocabulary, TOPIK words

This app helps you learn Korean vocabulary with daily lessons and review tests. It includes audio pronunciation, example sentences, and progress tracking. Study Korean words anytime, anywhere, even offline.

Highlights
  • Daily Korean vocabulary memorization
  • Review tests for learned words
  • Audio pronunciation of vocabulary
  • Example sentences for context
  • Progress tracking by part and unit
  • Favorites for difficult words
  • Offline access to all words
Features
Read full description

Korean vocabulary app, TOPIK Words (Korean words study app) Features - Provides a daily memorization of enough Korean vocabulary to memorize. - Tests allow you to review the Korean vocabulary you memorized that day. - Audio pronunciation of Korean vocabulary. - Example sentences using vocabulary. - Review functions for parts, units, and the entire Korean language. - Favorites: Press the star button to add words you're having trouble memorizing to your favorites. - Copy function: Press and hold a word in the vocabulary list to copy it. You can search for the copied word online for deeper study. - Setting/resetting learning progress: Press and hold a part or unit to set or reset learning progress. - Various test functions: Provides tests for filling in the blanks in example sentences, matching the meaning by looking at the word, matching the meaning by looking at the word, and matching the pronunciation by looking at the word. - Word search function. - Dark theme support. - iPad support. TOPIK words provides Korean vocabulary. TOPIK words provide Korean vocabulary divided to memorize per day, so everyone can study easily. In addition, you can check the TOPIK Korean vocabulary studied that day through the review feature. Have you just started to learn Korean? Don't you know how to read Korean yet? Do not worry. TOPIK words will support Korean voice, so you can learn how to read. You can study Korean vocabulary by listening and watching, even if you do not have any prior knowledge of Korean. It is important to study words every day! You can review the studied Korean vocabulary by part, unit, or whole words. Words that you incorrect in the review feature are shown more often. The more you use the app, the more customized the vocabulary is for you. All words are installed with the app when you download the app. So you can study Korean vocabulary anytime and anywhere. Let's study Korean TOPIK vocabulary via TOPIK words. [Subscription] Ad removal -Remove ads from the app at a cup of coffee price each month ($4.00 /month). -Subscription is managed through your iTunes account. -Payment for the next use within 24 hours of the end of the subscription period. In other words, if you do not turn off the auto-renewal function at least 23 hours before the end of the subscription service, the subscription will be automatically renewed. -Please refer to https://dev-yakuza.github.io/privacy/en/ for the privacy policy and terms of use. Let's study Korean TOPIK vocabulary via TOPIK words. - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Study Timer Study Rainbow

Features
Read full description

Study Rainbow is a study timer that helps you see the days until each exam, track your daily study time, and keep going with more confidence. Timers, records, analytics, and a supportive study partner turn small daily efforts into visible progress. Key features - See days remaining and study time at a glance - Study with Count Up, Count Down, and Pomodoro timers - Review today's progress, streaks, and period summaries - Track study progress for each exam - Get gentle support from your study partner - Stay focused with Focus Mode, widgets, and Live Activities Timers Choose Count Up, Count Down, or Pomodoro depending on how you want to study. Whether you want a short focused session or a longer stretch of deep work, Study Rainbow helps you build a rhythm that fits your day. Exam management Add exams, set exam dates, and see how your study time builds toward each goal. It works well for entrance exams, finals, certification tests, language study, and everyday self-study. Study analytics Check today's study time, your streak, and summaries across different periods. Looking back at what you have already done makes it easier to decide what to study next. Study partner In Study Mode, your study partner gives gentle encouragement while you study. On days when it is hard to start alone, a small prompt can make it easier to begin. Focus, widgets, and Live Activities Study Rainbow supports Focus Mode, widgets, and Live Activities so your study session can stay visible on the Home Screen, Lock Screen, and Dynamic Island. Student Support and Plus Study Rainbow includes the basic tools you need to start studying for free. Student Support and Plus are optional plans for people who want more timer settings, exam management, analytics, and study partner customization while supporting ongoing development. Recommended for people who want to: - See how many days are left until an exam - Track study time and feel their progress - Use Pomodoro or countdown timers to focus - Manage study for exams, finals, or certifications - Build a study environment that is easier to continue Study Rainbow supports the small steps you take every day. Turn the path to your next exam into visible progress. Privacy Policy https://sites.google.com/view/studio-rainbow-terms/ Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Korean vocabulary, TOPIK words4 screens
Study Timer Study Rainbow4 screens

Verdict

The call

The clearest difference is device support: Korean vocabulary, TOPIK words at 3 against Study Timer Study Rainbow's 1. Korean vocabulary, TOPIK words also leads on iOS requirement (15.0 vs 26.4). 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. Korean vocabulary, TOPIK words sells 1 in-app purchase, starting at $4.00 per month and Study Timer Study Rainbow sells 4 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Korean vocabulary, TOPIK words ships an update every 9 days, Study Timer Study Rainbow every 5 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Korean vocabulary, TOPIK words versus Study Timer Study Rainbow: the parameters behind the verdict, then further details
ParameterKorean vocabulary, TOPIK wordsStudy Timer Study Rainbow
PriceFreeFree
Rating4.7 (97 ratings) — better—
Positive reviews95.0% of reviews—
Number of ratings97 — better—
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better26.4
Further details — not scored
Size445 MB37 MB
Age rating4+4+
DeveloperJeongHean KimToshiaki Nakamura

In-app purchases

1 purchases

Korean vocabulary, TOPIK words

Subscriptions1
  • Remove Ads & Show all examples$4.001 Month
4 purchases

Study Timer Study Rainbow

Subscriptions4
  • Student Support Monthly$0.491 Month
  • Plus Monthly$1.991 Month
  • Student Support Yearly$5.991 Year
Show 1 more
  • Plus Yearly$19.991 Year

Questions

Is Korean vocabulary, TOPIK words free?
Korean vocabulary, TOPIK words is free to download, with in-app purchases available.
Is Study Timer Study Rainbow free?
Study Timer Study Rainbow is free to download, with in-app purchases available.
Do Korean vocabulary, TOPIK words or Study Timer Study Rainbow have ads?
Neither Korean vocabulary, TOPIK words nor Study Timer Study Rainbow shows ads.
Which is updated more often, Korean vocabulary, TOPIK words or Study Timer Study Rainbow?
Korean vocabulary, TOPIK words ships an update every 9 days, and Study Timer Study Rainbow every 5 days. Most recently, Korean vocabulary, TOPIK words was updated on October 26, 2026 and Study Timer Study Rainbow on October 25, 2026.

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