Comparison

Immersion Reader vs Suikō

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

Head to head
About

Immersion Reader

Easily look up Japanese words while reading ebooks with a single tap. Import custom dictionaries and export saved vocabulary for spaced repetition learning. Offers customizable themes for a comfortable reading experience.

Highlights
  • One-tap word lookup in Japanese ebooks
  • Import Yomichan and frequency dictionaries
  • Export vocabulary to Anki
  • Light and dark mode themes
  • Lookup neighboring words
Features
Read full description

Look up Japanese words as you read! Features - One tap to look up words in Japanese Ebooks. Tabs to help you look up neighboring words - Import Yomichan dictionaries and frequency dictionaries - Export saved vocabulary to Anki via Anki Dojo - Light mode, dark mode, and other themes for the dictionary

About

Suikō

Practice Japanese writing with AI-powered feedback on grammar, particles, and word choice. Fix mistakes yourself to internalize learning. Features daily prompts, writing streaks, and an archive of all your entries.

Highlights
  • AI grammar and word choice feedback
  • Self-correction of mistakes
  • Daily writing prompts
  • Writing streak tracking
  • Journal archive and search
  • Vertical and horizontal writing options
Features
Read full description

Japanese writing practice for intermediate to advanced learners. Write an entry, and get feedback on mistakes in grammar, particles and word choice. You fix each mistake yourself, so the phrasing you end up with is yours. Suikō turns writing practice into a routine you can keep. You write an entry. Tap Get feedback, and AI marks each mistake on the words you wrote, with a short note on what's wrong and what to use instead. It never rewrites your Japanese for you. Rewriting yourself is how the words you've studied become words you use. WRITE EVERY DAY – A new prompt each day, so there's always something to write about – Optional grammar suggestions to challenge yourself to use new grammar – A daily reminder to keep your writing habit consistent – Streaks to encourage you to show up every day FIX IT YOURSELF – Mistakes are marked without directly rewriting your entry – Each mark names the word, particle or grammar form that would fit more naturally instead – Up to 10 rounds of feedback on each entry, each round checks which of your fixes worked – 1 premium editor pass to strengthen your writing, fix what sounds stiff or translated, and rate the JLPT level your writing shows – A satisfying seal to mark your entry as complete A PAGE MADE FOR JAPANESE – Vertical (縦書き) or horizontal writing – Ruled lines or a blank page KEEP EVERYTHING – Every entry and every version of it, in your archive – Search everything you've written – Export your journal as a spreadsheet FREE TO WRITE, SUBSCRIBE FOR FEEDBACK Writing is free: the prompts, grammar suggestions, and viewing your old writing in the archive. You get AI Feedback by subscribing to The Editor: $9.99 a month or $99.99 a year in the US (prices vary by country), with a 7-day free trial for new subscribers. Payment is charged to your Apple ID. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period, in your Apple ID settings. Cancel before the trial ends and nothing is charged. YOUR WRITING IS PRIVATE There's no feed and nothing is shared. Your text goes to Anthropic and Google for feedback only when you tap Get feedback, and only after you've allowed it. For learners at roughly N3 to N1 and beyond who can already write a few sentences on their own. Feedback is tuned to the level you choose. 推敲: to polish one's writing. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: https://suiko.ink/terms Privacy Policy: https://suiko.ink/privacy

Screenshots

Immersion Reader4 screens
Suikō4 screens

Verdict

The call

The clearest difference is rating: Suikō at 5.0 against Immersion Reader's 4.0. Immersion Reader's advantage is ratings volume (27 vs 1) and update cadence (every 6 days vs every 3 weeks). 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. Immersion Reader sells 1 one-off in-app purchase and Suikō sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Suikō holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Immersion Reader has 27 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Immersion Reader ships an update every 6 days, Suikō every 3 weeks. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard4 real differences · 6 level
Immersion Reader versus Suikō: the parameters behind the verdict, then further details
ParameterImmersion ReaderSuikō
PriceFreeFree
Rating4.0 (27 ratings)5.0 (1 ratings) — better
Positive reviews61.5% of reviews—
Number of ratings27 — better1
Update frequencyEvery 6 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size80 MB2 MB
Age rating4+4+
DeveloperMathew ChanTIMOTHY HUANG

Customer experience

Immersion Reader

All ratings26 ratings
Positive76.9%
Neutral3.8%
Negative19.2%
Written reviews13 reviews
Positive61.5%
Neutral7.7%
Negative30.8%

Suikō

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Immersion Reader

One-time1
  • Immersion Reader Premium$4.99
2 purchases

Suikō

Subscriptions2
  • The Editor, monthly7 Days trial$9.991 Month
  • The Editor, yearly7 Days trial$99.991 Year

Questions

Is Immersion Reader free?
Immersion Reader is free to download, with in-app purchases available.
Is Suikō free?
Suikō is free to download, with in-app purchases available.
Which has better reviews, Immersion Reader or Suikō?
Suikō is rated higher. Immersion Reader averages 4.0 out of 5 from 27 ratings, while Suikō averages 5.0 from 1 ratings.
Do Immersion Reader or Suikō have ads?
Neither Immersion Reader nor Suikō shows ads.
Which is updated more often, Immersion Reader or Suikō?
Immersion Reader ships an update every 6 days, and Suikō every 3 weeks. Most recently, Immersion Reader was updated on October 24, 2026 and Suikō on October 29, 2026.

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