Comparison

Otterfile vs 文件预览助手

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Otterfile

Features
Read full description

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/

About

文件预览助手

Features
Read full description

无论是代码文件、文档、图片还是音视频,一个App全部搞定,彻底解决手机无法打开特定格式文件的痛点。 文件预览助手是一款手机上的万能文件查看器,支持120+种文件格式,覆盖日常遇到的几乎所有文件类型,提供媲美桌面端的专业阅读体验。 从专业级代码高亮到Markdown全功能编辑,再到多媒体播放与文件管理,全方位满足你的移动浏览需求。 【核心功能亮点】 1、专业级代码阅读 支持120+种文本格式语法高亮,覆盖Dart、Python、JavaScript、Java、Go等30+种编程语言; 提供6种精选代码主题及自动模式,支持行号显示、字体调节和自动换行; 内置JSON一键美化或压缩功能,支持HTML源码和渲染视图自由切换。 2、Markdown全功能 完整的Markdown渲染预览,支持GFM扩展如表格、代码块高亮和引用; 横屏自动开启左编辑右预览的双栏模式,支持大纲导航一键跳转; 内置编辑快捷工具栏,支持标题、加粗、链接、表格一键插入,并可导出为PDF或HTML。 3、图片画廊与处理 支持JPG、PNG、GIF、WebP、SVG、BMP等主流格式,同目录多图滑动浏览; 支持双指最大10倍缩放、双击放大、旋转查看,并可查看EXIF拍摄信息; 内置图片处理工具,支持裁剪、缩放及格式转换,满足基础修图需求。 4、音视频播放体验 内置专业音频播放器,支持随机、循环播放及0.5x-2.0x倍速调节,锁屏即可控制; 支持MP4、MOV、AVI、MKV等主流视频格式,全屏播放支持进度拖动和横屏自动旋转; 音频支持后台持续播放和悬浮迷你播放器,自动记忆播放位置,下次打开继续收听。 5、文档预览与管理 PDF支持分页渲染、双指缩放、页码显示和阅读位置记忆,流畅不卡顿; 通过内置引擎直接预览Word、Excel、PPT等Office文档,无需额外安装应用; 内置文件浏览器,支持目录树导航,可按名称、时间、大小、类型排序,支持全局搜索。 6、智能辅助功能 支持UTF-8、GBK、Latin-1等8种编码自由切换,未知格式自动尝试文本打开; 注册为系统文件打开方式,其他App可直接调用,剪贴板复制文本可直接预览; 完整适配深色模式,保护眼睛,超大文件分块加载,确保不卡顿不闪退。 【适用场景】 程序员/开发者:在移动端随时查看代码、配置文件和日志,利用语法高亮和JSON格式化快速定位问题; 学生/写作者:阅读和编辑Markdown笔记,利用双栏模式和大纲导航高效写作,并导出为PDF分享; 设计师/摄影师:浏览高清图片画廊,查看EXIF设备参数和拍摄信息,进行简单的图片裁剪和格式转换; 日常办公用户:在手机端直接预览PDF合同、Word文档和PPT演示文稿,无需依赖电脑即可处理紧急事务。 【为什么选择文件预览助手?】 格式覆盖极广:支持120+种文件格式,真正实现万能查看,告别格式不兼容的焦虑; 专业代码体验:提供30+种编程语言高亮和多种主题,移动端也能拥有桌面级的代码阅读感受; 功能深度整合:集查看、编辑、播放、管理于一体,无需在多个App之间频繁切换; 极致性能优化:大文件分块加载技术保证流畅度,自动记忆阅读位置和播放进度,体验无缝衔接。 让每一次文件打开都变得简单高效。 立即下载【文件预览助手】,开启全能移动浏览新体验!

Screenshots

Otterfile4 screens
文件预览助手4 screens

Verdict

The call

The clearest difference is in-app purchases: 文件预览助手 at none against Otterfile's 3. 文件预览助手 also leads on update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Otterfile sells 3 in-app purchases, starting at $0.99 per month. 文件预览助手 asks for nothing beyond the download.

UpkeepUpdate frequency

Otterfile ships an update every 2 months, 文件预览助手 every 2 weeks. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 2 level
Otterfile versus 文件预览助手: the parameters behind the verdict, then further details
ParameterOtterfile文件预览助手
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size120 MB56 MB
Age rating4+17+
Developer宁 权北京创效未来

In-app purchases

3 purchases

Otterfile

Subscriptions2
  • Month Purchase$0.991 Month
  • Year Purchase$6.991 Year
One-time1
  • Lifetime Prucahse$9.99
None

文件预览助手

No in-app purchases

Questions

Is Otterfile free?
Otterfile is free to download, with in-app purchases available.
Is 文件预览助手 free?
文件预览助手 is free to download, with no in-app purchases.
Do Otterfile or 文件预览助手 have ads?
Neither Otterfile nor 文件预览助手 shows ads.
Which is updated more often, Otterfile or 文件预览助手?
Otterfile ships an update every 2 months, and 文件预览助手 every 2 weeks. Most recently, Otterfile was updated on September 14, 2026 and 文件预览助手 on September 21, 2026.

Other comparisons