Reading manga on your iPhone runs into three separate problems, and most guides only answer one. First, you need the raw pages in a format the phone can actually open: CBZ and PDF both work, but they behave very differently once you're scrolling a real chapter. Second, you need a reader built for comics, since Files and Photos will open a page but skip page-by-page navigation and right-to-left order entirely. Third, and this is the part every "best manga apps" listicle skips, a printed Japanese tankobon page is bigger than your screen, so raw text can shrink past readable size before you even open the file.
Solve all three and the pages open fine. They're still in Japanese.
Getting a raw page onto your phone
A raw page has to come from somewhere. Three sources cover most readers: a scan of a physical volume (a flatbed scanner, or just a phone camera held flat over the page), a purchased digital raw from a Japanese storefront like BOOK WALKER or Kindle Japan, or a page exported from a Japanese ebook app you already have rights to read.
Two formats carry that page onto an iPhone. CBZ is a zipped folder of page images wearing a comic-reader file extension: each page is its own image, so zooming, panel navigation and right-to-left order all work per page. PDF keeps a fixed layout, which is fine for one page but gets awkward fast across a two-page spread, since the reader has to guess where one page ends and the next begins. Given the choice, CBZ reads cleaner on a phone.
Getting the file onto the device is the boring part: AirDrop from a Mac, a direct download in Safari, or an import from iCloud Drive or Google Drive through the Files app. Once it's on the phone, a dedicated reader takes it from there.
Which reader actually opens the file you have
| Reader | Formats it opens | Opens your own raw file | Right-to-left toggle | Price |
|---|---|---|---|---|
| YACReader | CBR, CBZ, ZIP, RAR, PDF | Yes | Yes | Free, open source |
| Manga Viewer (CBZ/CBR Reader) | CBZ, CBR | Yes | Yes | Free, in-app purchase for iCloud sync |
| ReadEase | PDF, CBZ, CBR | Yes | Yes | Free, in-app purchase |
| Files + Preview (built in) | PDF, images | Yes | No dedicated mode | Free |
| MANGA Plus / Shonen Jump / VIZ Manga | Their own licensed catalog | No | Yes, native | Free or subscription |
That last row is the catch behind most "best manga apps for iPhone" lists. Shonen Jump, MANGA Plus and VIZ Manga are genuinely good readers for what they carry, and each nails vertical scroll and right-to-left layout natively. None of them, though, will open a CBZ or PDF you already own; they stream their own catalog only. If the plan is to read a raw file you scanned or bought yourself, the list you want is the CBZ and PDF readers above, not the App Store's top charts.
App Store listings checked September 2026. Details change, so confirm formats before you commit to one.
Why the page looks tiny before you even zoom in
Here's the part nobody quantifies. Apple publishes the iPhone 16's screen as 6.1 inches diagonal at 2556 by 1179 pixels, and that ratio works out to an active display of roughly 65mm wide by 141mm tall. Now put a real page next to it. Most Japanese manga tankobon are trimmed to JIS B6, 128mm by 182mm, the same rectangle you'd pick up in a bookstore. Fit that page's full width onto the phone's 65mm of screen and it renders at roughly half its printed size. Furigana, sound effects and anything set in a small font shrink well below what most people can read without a second zoom, and once you zoom in, the page's width no longer fits, so you end up panning sideways on every panel. Furigana, already tiny in print, is the first casualty of that shrink; see what furigana actually is if the small kana above the kanji is new to you.
Some volumes dodge this. Deluxe or art-book editions often print at A5, 148mm by 210mm (worse on a phone, not better), while cheaper bunko reprints run closer to A6, 105mm by 148mm, which lands much nearer the screen's own size and reads more comfortably. Check the trim size first.
The part no reader app fixes
Every reader above does exactly one job: it shows you the pixels that were already on the page. None of them touch the Japanese. That's the real problem, and it's separate from formatting or screen size entirely.
This is where a manga translator does something a comic reader can't. Import the same CBZ page, or point the camera at the physical volume instead of scanning it first, and Yomi's manga mode replaces the Japanese inside each bubble with English sized to fit that bubble, not shrunk to fit the whole page. You're no longer fighting a tiny font and an unfamiliar language at once, since the translated text gets its own readable size regardless of how small the original tankobon trim was. Yomi needs an internet connection to translate the page, same as any cloud-based tool, so keep data or wifi on while you read.
Making a raw page easier to read once you're set up
A few adjustments compound with the fix above:
- Pick CBZ over a scanned PDF spread when you have the choice, since single-page images crop and zoom far more predictably than a two-page PDF spread.
- Turn off "fit to width" in favor of a per-panel or guided view where the reader offers one; it cuts the sideways panning from the math above.
- Read in portrait for a standard tankobon page, and save landscape for genuine double-page spreads only.
- Nudge the reader's base zoom slightly past 100% instead of relying on pinch-zoom mid-page. It's one setting instead of a gesture repeated every panel.
None of this fixes the language. It just means the panels you can already read stay comfortable for a whole volume, not just the first ten pages.
Webtoons and manhwa are a different shape
A vertical-scroll webtoon or manhwa chapter isn't paginated at all, so the print math above doesn't apply the same way; panels are already full width by design. The bottleneck there is scroll speed against bubble density instead of print trim. If that's the raw you're stuck on, reading raw manga in English covers the method for both, and the manga translator comparison breaks down which tools actually handle a long vertical strip well and which ones choke on it.
Read the whole file, not just what you can zoom into
None of this is complicated once it's set up: right format, right reader, sizes adjusted, translation running when the Japanese won't budge on its own. The rule worth keeping is what you do with the result. Reading a raw you scanned from your own volume, or bought as a digital file, for your own reading is personal use. Reposting the translated pages, or passing them off as a scanlation, isn't, and it undercuts the people who made the book. Buy the volume when an official English edition exists, and save this method for the ones that haven't gotten one yet.