# GrepTag: Search & Tag Books — Search, Tag & Organise Books

> Search, Tag & Organise Books (iPhone/iPad app by KIEN WEI CHOO.)

- Source: https://appshunter.io/ios/app/greptag-search-and-tag-books/id6779977609 (this page in markdown: same URL + `.md`)
- Developer: [KIEN WEI CHOO](https://appshunter.io/developer/1872314467)
- Category: Utilities, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Dutch, French (France), Indonesian, Japanese, Korean, Malay, European Portuguese, Russian, Chinese (Simplified, China) and 1 more
- Released: 2026-06-24
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/greptag-search-and-tag-books/id6779977609/reviews.md

## What is GrepTag?

GrepTag is a keyword-scanning and tagging utility for your local TXT and EPUB files. Point it at your collection, search inside every file, and let it tag your library for you.

GREP SCAN — FREE AND UNLIMITED
Search the full text of every file you add. No upload, no developer-run cloud index — GrepTag reads directly from your files on device. Enter any keyword, tap Search, and see exactly which files contain it.

KEYWORD PROFILES FOR RECURRING SCANS
Build named profiles using AND, OR and NOT logic — "Sci-Fi AND dragons NOT romance" — and re-run them whenever your collection grows. Turn on Auto-run and new files are scanned and tagged automatically the moment they are imported.

AUTOMATIC TAGGING
Apply tags straight from scan results with a single tap, or add them by hand. Filter by one or more tags to pull up everything matching a theme. The free tier includes 5 tags; Pro unlocks unlimited.

TXT COVER MATCHING (PRO)
Most apps ignore TXT files when it comes to cover art. GrepTag finds covers automatically: when a folder holds an image with the same filename as your TXT file, it is picked up as the cover. You can also long-press any TXT file and paste a direct image URL — GrepTag downloads, crops and saves it alongside the file, so the cover survives every re-scan.

EPUB COVER EXTRACTION — FREE
EPUB covers are read straight from the file and shown in your grid. No manual setup needed.

ORGANISE INTO FOLDERS (PRO)
Move files into subfolders from inside the app. File paths are updated as part of the move, so nothing loses its tags.

Wi-Fi SYNC BETWEEN DEVICES (PRO)
Transfer files and tags directly over your own local Wi-Fi. iCloud is used only for small discovery metadata when enabled; your files are never uploaded to developer-run servers.

EXPORTABLE TAG DATABASE (PRO)
Tags live in a JSON database you can export, so the work you put into organising your collection stays yours and moves with you. Importing a tag database is free.

EVERY MAJOR SCRIPT
Latin, CJK (Chinese, Japanese, Korean), Arabic, Cyrillic — scan for keywords in any language.

Read in place: TXT and EPUB files open in a built-in viewer with adjustable type, themes and text-to-speech, so you can check a match without leaving the app.

WHAT'S FREE
• Full grep scan — unlimited scans and keywords
• Up to 5 tags
• Up to 2 grep profiles
• Import Tag DB
• EPUB cover extraction

PRO UNLOCKS
• Unlimited tags
• Unlimited grep profiles
• Move and organise files into folders
• Wi-Fi sync between Mac and iPhone
• TXT cover auto-match and URL fetch
• Export Tag DB

Privacy: Files are processed on your device or transferred over your own Wi-Fi. No tracking. No developer-run server.

Legal:
Privacy - https://mlt-solutions.github.io/app-legal-docs/greptag/PRIVACY
EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| BiblioFuse Grep Tag Pro Monthly | $0.99 | per month |
| BiblioFuse Grep Tag Pro Yearly | $4.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| BiblioFuse Grep Tag Pro | $14.99 | one-time |



## Version history (last 5 releases)

### 1.0.11(26) — 2026-09-01

New name, new icon — same app.

• BiblioFuse Grep Tag Reader is now GrepTag. Your library, tags, grep profiles and device pairings are unchanged — nothing to migrate, and no need to re-sync.
• A new app icon, plus updated naming throughout the app, including the Files and iCloud Drive folder.
• Sharper focus on what GrepTag is for: full-text grep scanning, saved AND/OR/NOT keyword profiles, automatic tagging on import, and cover matching for TXT files.

### 1.0.10(25) — 2026-08-26

Faster, more resilient Auto Sync between your Mac and iPhone.

• Auto Sync engine rebuilt — recovers automatically from interrupted or incomplete transfers, no manual reset needed
• New: a clear on-screen notice when a sync batch is too large for your iCloud transfer limit, with a direct link to Manual LAN Sync
• Device names in Auto Sync now show what you actually named your device, not a generic "iPhone"
• Mac's scheduled Auto Sync catches up automatically if a sync was missed while your Mac was asleep
• Reclaim iCloud storage from devices you no longer use, right from Auto Sync Settings
• Various sync reliability and bug fixes

### 1.0.9(24) — 2026-08-24

What's New
• Browse your library by folder, just like Files — folder cards show book counts and covers.
• Faster, smoother reading: EPUB and TXT rendering and page-turn navigation have been rebuilt for quicker, more reliable chapter transitions.
• The reader now opens full-screen, with toolbars that fade away while you read.
• Read Aloud now starts speaking instantly and adds a floating mini-player, so you can keep browsing your library while it plays — open, pause, resume, or stop anytime.
• More accurate bookmarks and in-book search, with your reading position tracked precisely as you read.
• More reliable Wi-Fi Sync device discovery — the iCloud folder used to find other devices is now created automatically, even on a brand-new install.
• Auto Sync via iCloud — turn it on for the device with your library, pick which devices to send books to, and they'll collect new books automatically with nothing to set up on their end.
• Add a schedule so Auto Sync keeps checking for new books on its own, even while you're away.
• Manage synced devices from Settings — rename this device, remove ones you no longer use, and reclaim their space.
• Refreshed layout throughout Settings, Grep, and the main window for a cleaner look on Mac.

### 1.0.7(19) — 2026-08-04

Reader improvements — faster, and it keeps your place.

• Faster chapter changes in both TXT and EPUB.
• Chapters open where they should: going back lands at the true end of the previous chapter, going forward on its first line.
• Changing EPUB text size keeps your place instead of jumping to the top — and no longer overwrites your saved position.
• Read Aloud starts from the first line you can see, and the spoken-word highlight stays in step with the narration through a whole chapter.
• Tapping a search result highlights the exact match, even deep inside long chapters.
• Bookmarks and reading progress restore closer to where you actually left off.

### 1.0.6(18) — 2026-07-08

• Fixed whole-book search after automatic TXT chapter splitting.
• Safer deletion sync: deleting a book on one device now marks it as deleted on other devices instead of removing their local copies.

## Apps similar to GrepTag

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Castly: Full-Cast Audiobook](https://appshunter.io/ios/app/castly-full-cast-audiobook/id6768542554) | — | Free | Utilities |
| [Photo Folders Tag Organizer](https://appshunter.io/ios/app/photo-folders-tag-organizer/id6768664318) | — | Free | Utilities |
| [Kinder - Ebook Reader](https://appshunter.io/ios/app/kinder-ebook-reader/id6779840110) | — | Free | Utilities |
| [MasterRPG](https://appshunter.io/ios/app/masterrpg/id1594965885) | — | Free | Utilities |
| [PickImage](https://appshunter.io/ios/app/pickimage/id1437722072) | — | Free | Utilities |
| [HTTPocket - WiFi File Transfer](https://appshunter.io/ios/app/httpocket-wifi-file-transfer/id6775785733) | — | Free | Utilities |

## More apps by KIEN WEI CHOO

- [BiblioFuse Reader & Compress](https://appshunter.io/ios/app/bibliofuse-reader-and-compress/id6758330093)
- [PacketPlanner](https://appshunter.io/ios/app/packetplanner/id6758939717)
- [LuxeBook](https://appshunter.io/ios/app/luxebook/id6761766042)
- [SmartDecrypt PDF ZIP](https://appshunter.io/ios/app/smartdecrypt-pdf-zip/id6763979229)
- [ContentCue: Read & Listen](https://appshunter.io/ios/app/contentcue-read-and-listen/id6770080864)
- [Kitty Gambit](https://appshunter.io/ios/app/kitty-gambit/id6774511219)

All apps by KIEN WEI CHOO: https://appshunter.io/developer/1872314467

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*