Contact the developer
Email developer@typcb.cn with your app version, iOS version, device model, steps to reproduce, and any error message. We receive these details only if you choose to send them.
Redact private content in screenshots. Do not send Apple passwords, payment card details, verification codes, or entire private books. Find the app version in About on the bookshelf.
Import failures or garbled text
Choose Files from the bookshelf import menu. Supported limits are TXT up to 32 MiB, DRM-free EPUB up to 100 MiB, and unencrypted PDF up to 100 MiB and 5,000 pages. For cloud files, ensure the download is complete and your device has enough free storage.
TXT supports UTF-8, UTF-16 with a BOM, and GB18030 / GBK. For garbled text, convert the original file to UTF-8 and import again. EPUB files with DRM, encryption, or font obfuscation are not supported. PDF password unlocking, OCR, and text reflow are not currently supported. Renaming a file extension does not convert its format.
Covers, list layout, and deleting books
Open the bookshelf’s upper-right menu to switch between cards and a list, manage covers, or delete books. Long-press a book for individual actions. Custom covers require Pro and display a lock before unlocking. Deletion and basic reading are free.
Cover changes process only the photo you select and do not modify the original. Check your selected books before deleting: their app copies and associated notes are removed, while original external files remain unchanged.
Buying Pro, restoring, and refunds
Open the purchase screen from About on the bookshelf or a locked Pro feature. Pro is a one-time purchase without automatic renewal; Apple’s confirmation screen shows the final price. Existing owners should choose Restore purchases using the original purchasing App Store account.
If Pro is not unlocked, check your connection and try restoring. Ask to Buy or pending transactions must be completed by Apple. Do not pay again just to restore a purchase. For refunds, use Apple’s Report a Problem service; we cannot directly manage your payment.
The welcome offer lasts 7 days from first use of this feature on this device. Open Pro to see its deadline and current App Store price. Changing language, clearing reading history, or reopening the purchase screen does not reset the window. An abnormal device clock or unavailable eligibility record may hide the offer. Owners of either Pro lifetime product should restore purchases instead of paying again.
Reading history, notes, and language
Reading history on the bookshelf shows recently read books and controls local duration recording; detailed charts require Pro. The upper-right menu in the reader contains bookmarks, notes, and reading settings. Share or export notes as text from the notes list.
Choose Follow System or a specific language in About → App language. Book content and existing notes are not automatically translated. Online help and policies currently offer English and Simplified Chinese; switch languages at the top of each page.
Basic reading themes are free; locked themes require Pro. PDF retains its original page content: reading themes do not recolor PDF document pages.
Why am I seeing a Pro recommendation?
For readers without Pro, the app may recommend Pro after enough effective reading time, when leaving the reader for the bookshelf. It does not interrupt the book while you are reading. The first prompt requires 2 accumulated hours, followed by at least 4 additional hours for each later prompt, with no daily limit. Viewing the purchase screen restarts the interval. A long reading session results in one prompt, not a queue of back-to-back prompts.
You can dismiss every purchase screen and continue reading for free. A recommendation never charges you or requires a purchase to continue basic reading. Pro owners do not receive automatic upgrade prompts.
Changing devices, deletion, and recovery
There is currently no developer-operated cloud sync. Keep original books before changing devices and check whether your iCloud or computer device backup includes app data. A notes export saves text only, not a complete library backup.
Turning off duration recording stops new time measurements. Clearing duration statistics does not delete books or notes, or clear reading positions, last-read dates, or local Pro reminder progress. Deleting a book removes its app copy and associated records.
iOS Delete App removes local app data; Offload App, which preserves documents and data, is different. Without original files or an available backup, we cannot recover your library from a server. Restoring Pro restores the entitlement, not your books. The device-only Keychain offer record is an exception to this deletion description and may remain after reinstallation; it contains no books, notes, or identity details.