A calm alternative to Moon+ Reader, ReadEra and Lithium

Moon+ Reader, ReadEra and Lithium are well-loved e-book readers for Android. Silent Book is an EPUB, FB2 and PDF reader for Android built for one thing: calm reading of the books you already have. Here is an honest comparison, so you can pick the one that fits you.

	Silent Book	Moon+ Reader	ReadEra	Lithium
Formats	EPUB, FB2 (zipped too), TXT, PDF, DOCX, HTML; CBZ comics; audiobooks (MP3, M4A, M4B, AAC, OGG, WAV, FLAC)	EPUB, PDF, DJVU, AZW3, MOBI, FB2, PRC, CHM, CBZ, CBR, UMD, DOCX, ODT, RTF, TXT, HTML, MHT, MD, WEBP, RAR, ZIP, OPDS	PDF, EPUB, DOC, DOCX, RTF, MOBI, AZW3, DjVu, FB2, TXT, ODT, CHM	EPUB
Offline reading	Yes: books, reading places and settings stay on the phone	—	Yes	—
Price	Free; AI features that cost money to run are paid per use with S Coin packs, or come with a Premium subscription	Free, with in-app purchases and a Pro version	Free; ReadEra Premium is paid once	Free; a paid Lithium Pro app unlocks extra features
Ads	No ads while you read; Assist, the in-app helper, offers an optional rewarded video	Contains ads; the Pro version is ad-free	No ads	No third-party ads (it may suggest the Pro upgrade)
Sync	Progress, marks and settings backed up to your account and restored on a new phone after Google sign-in; no live sync between two devices	Backup and restore through Dropbox or WebDAV; reading positions synced between phones and tablets	With ReadEra Premium: books, reading progress, bookmarks and quotes through Google Drive	With Lithium Pro: reading position, highlights, notes and bookmarks through Google Drive (not the books)

A dash means the app's own Google Play page does not say; it is not a claim that the feature is missing. Checked on 29 September 2026 against the Google Play pages of Moon+ Reader, ReadEra and Lithium, and on 14 October 2026 against ReadEra's own site (which also lists CBR and CBZ comics) and its ReadEra Premium page. Apps change: if a line here is out of date, tell us and we will fix it.

Where Silent Book is different

Calm by design. One tap for full screen, a focus mode that hides every control, night warmth and 13 moods, all free (Paper, Noir, Aura, true-black AMOLED and more).
Reading ambience. Spring rain, sea waves, a campfire, autumn forest wind, winter snow or summer crickets play over the page, with an optional soft piano: free, with no daily limit and no sign-in.
Marks travel inside the book. Mark a line, write what you felt, and share the file: a friend reads your impressions in their own Silent Book.
Your audiobooks on the same shelf. MP3, M4B and other audio files you own play with chapters, speed and a sleep timer.
Read in your language. Translate a book chapter by chapter into one of 49 languages, paid with S Coin, or, with Premium, have a whole book translated in the background.
27 app languages, Uzbek in Latin and Cyrillic among them, and the phone's own voice reads your EPUB, FB2 and text books aloud for free.

Where another app may suit you better

You read MOBI, AZW3, DjVu or CBR files: Silent Book does not open them; Moon+ Reader and ReadEra list them.
You want reading positions synced live between a phone and a tablet: Moon+ Reader does it through Dropbox or WebDAV, Lithium Pro and ReadEra Premium through Google Drive.
You want no ads and nothing to pay: ReadEra's site says its app is free and ad-free; ReadEra Premium is the paid version.

Try it

Silent Book is on Google Play for Android; it opens country by country. Reading your own books is free.

Or open a book right now in your browser, with nothing to install: read EPUB, FB2 and PDF online.

Silent Book for Android