docuViewer – PDF, Word, Excel

docuViewer opens PDF, Word, Excel, PowerPoint and Korean HWP/HWPX files right on your phone, and on-device AI summarizes and answers questions. No third-party ads, no Internet permission.

■ No third-party ads · documents stay on your phone
· No ads from other companies, no ad SDKs.
· No Internet permission: documents open only on the device.
· AI runs on your phone. Nothing is sent.
· No sign-in, no personal data collected. Works in airplane mode.

■ Supported formats
· PDF · DOCX, DOC · XLSX, XLS · PPTX, PPT · HWP, HWPX
· TXT, CSV (EUC-KR auto-detected) · RTF · ODT, ODS, ODP · templates (DOTX, XLTX, POTX, HWT…)
· Password-protected files (passwords never stored; not legacy DOC/XLS/PPT)
· Photos, videos, music and recordings (MP3…) · Scanned and fax PDFs display correctly

■ Photos, videos and music in the same app
· Photos and Videos tabs: by folder and date; full screen, zoom, swipe, play.
· Audio tab: music and recordings by folder, auto-next, no ringtones.
· Photos to PDF: pick photos, set order and rotation, save as one PDF.
· Merge PDFs from My Documents, password-protected ones too.
· Capture a region of a photo or a frame of a video.
· Decorate photo: mosaic or stickers on faces, brush or box any area, add light effects, drawing and gradient text. Save to the original or as new.
· Voice search: the mic in the search box or the app icon shortcut.

■ Summarize and ask with on-device AI (supported devices)
· The Document tab shows a short summary at once; a detailed one in your chosen language.
· Tap the frog AI button (bottom right) to ask, e.g. "What is the total on this quote?" Type or speak; hear answers aloud.
· Tap an answer's source to jump to its page.
· Needs Android's built-in AI; the system downloads the model once (Wi-Fi recommended).

■ All your documents in one list
· From Download, messengers and more: filter by type, search, sort, list or preview cards. Long-press a type tab to pin it first.
· In-app folders (with subfolders) for documents, photos, videos, music; files stay in place.
· Rename files in the app (the extension stays).

■ Comfortable reading
· Pinch to zoom, double-tap to fit width, full screen with one tap
· Read aloud from the current page in the document's language (offline)
· Built-in Korean fonts, text selection and copy, find text, recent documents

■ Get things done
· Memo: sticky notes on HWP, Word, PowerPoint and PDF pages, listed in the Document tab; originals untouched
· Annotate PDF with pen, highlighter and text; save to the original or as a new PDF
· Capture the page as an image, or just an area in a shape like a circle, star or heart
· Share documents via messengers or email
· Save HWP, Word, Excel and PowerPoint as PDF to Download and open it, also from ⋮ in the list
· Print via the Android print screen
· Delete old documents (only after you confirm)

■ 7 languages: Korean, English, Japanese, Chinese (Simplified/Traditional), Vietnamese, Indonesian

■ Free and PRO
· Viewing, search, read aloud, sharing, folders, memos and the short summary are always free.
· Detailed AI summary and Q&A, capture, saving decorated photos and annotated PDFs, save as PDF (incl. photos to PDF, merge) and print are free a few times a day; PRO (monthly or yearly) removes the limit. The free plan limits items per PDF. Prices are shown in the app.
· Billed via Google Play; cancel any time there. No account needed.

■ Permissions
· All files access (optional): only to list your files across folders and to open, share, rename or delete the ones you choose. Without it, use the Files app or "Open with".
· Microphone (optional): only while you ask or search by voice. Speech becomes text on your phone and is never stored or sent.

· Layout may differ slightly from the original apps.
· The home screen shows a one-line intro to our service (docu).

Website: https://documindkorea.com/docuviewer
Privacy policy: https://documindkorea.com/privacy
Contact: support@documindkorea.com
DNITECH Co., Ltd.