# Otterfile — local file multi-format reader

> local file multi-format reader (iPhone/iPad app by 宁 权.)

- Source: https://appshunter.io/ios/app/otterfile/id6760924129 (this page in markdown: same URL + `.md`)
- Developer: [宁 权](https://appshunter.io/developer/1710975082)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 120 MB
- Languages: English, Chinese
- Released: 2026-03-26
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/otterfile/id6760924129/reviews.md

## What is Otterfile?

File Management and Transfer:
- Local Management: Supports file categorization, sorting, multi-selection, and routine management operations (copy, cut, rename, delete). Includes a built-in recycle bin to prevent accidental file deletion.
- File Import: Supports importing from system photo album and system files, and provides native scanned document to PDF conversion function.
- Local Area Network Transfer: After enabling the Wi-Fi file transfer service, you can directly drag and drop files to transfer between devices via your computer's browser.
- Cloud Drive Mounting: Supports binding to Alibaba Cloud Drive, Baidu Cloud Drive, OneDrive, Google Drive, and Dropbox for cross-platform file management.
Compression and decompression:
- Format support: Supports compression and decompression of ZIP, 7Z, and TAR formats.
- Encoding adaptation: Built-in file encoding detection and manual switching functions solve common Chinese character encoding problems during cross-device transmission.
Multi-format preview:
- Office documents: Natively supports viewing Office (Word, Excel, PPT), PDF, and various common image and text formats.
- Plain text and code: Supports highlighting of 24+ formats including TXT, JSON, HTML, and Python.
- Basic media playback: Supports standard audio and video formats such as MP4 and MP3, and provides background playback, progress memory, and speed adjustment options.
Otterfile Pro Advanced Features:
- Advanced audio and video decoding: Supports playback of non-native video formats such as MKV, AVI, FLV, RMVB, and WMV, and supports loading external subtitles such as SRT, ASS, and SSA.
- Professional format preview: Supports previewing design drawings such as PSD, Sketch, DWG, and AI, as well as 3D models such as STL and GLTF.
- Advanced Compression and Data Viewing: Supports parsing password-protected encrypted archives and multi-volume compression settings; provides HEX (hexadecimal) view mode.
- Privacy Vault: Provides a separate, locally encrypted vault that requires Face ID/Touch ID verification for access.
Privacy Statement: Otterfile's core functions run entirely on your device. Except for user-initiated cloud drive synchronization or sharing, the application will not upload your local files to third-party servers.
Issue Feedback: If you encounter any format compatibility or basic function issues during use, please feel free to contact us through the "Issue Feedback" section within the app.

Privacy Policy: https://otter-labs.notion.site/Privacy-Policy-32cd85b21b3c80cbb4e7e12386c4fc71?pvs=73
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Year Purchase | $6.99 | per year |
| Month Purchase | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Prucahse | $9.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-07-01

New support for previewing certificate formats has been added.
fixed some bugs.

### 1.0.1 — 2026-04-02

This update further expands the boundaries of file processing, making your mobile work more productive:
Full Protocol Coverage: Added support for SMB, WebDAV, FTP, and SFTP network services. Now you can access resources on your NAS or server as if they were local files, enabling remote collaboration anytime, anywhere.
Hexadecimal Preview: Designed for developers and tech enthusiasts. Supports viewing any file in Hex mode, revealing underlying details and meeting professional data analysis needs.
Direct Reading of CAD Drawings: Deeply optimized support for engineering design files. Added DWG and DXF format preview functionality, allowing you to quickly view architectural or mechanical design sketches without opening heavy software.

### 1.0 — 2026-03-26

No release notes.

## More apps by 宁 权

- [水獭漫画 - 纯净的本地漫画阅读器](https://appshunter.io/ios/app/id6680193025)
- [Cyber Merit Box](https://appshunter.io/ios/app/cyber-merit-box/id6759593394)

All apps by 宁 权: https://appshunter.io/developer/1710975082

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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 2026-07-09.*