OTG Flash Pro vs iStorex PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OTG Flash Pro
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OTG Flash Pro helps you easily manage files on your USB drive, classify and view files, and backup and restore photo albums and contacts for you.
iStorex PRO
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iStorex 是专为 iPhone打造的 OTG 高速文件传输与管理工具。不用电脑、不用 iTunes、不用云盘，手机直接插 U 盘 / 读卡器 / 移动硬盘，照片、视频、文档、音乐、压缩包 即插即读、高速互传，是摄影、办公、旅行、自媒体人的必备工具。 【为什么选 iStorex】 ・真正 OTG 直传：支持 Lightning/USB‑C OTG 适配器，即插即用 ・全格式兼容：FAT32 /exFAT/ NTFS（大文件 4GB + 无压力） ・相册一键备份：整机照片视频批量导出到 U 盘，释放内存App Store ・无广告・无内购・无数据上传，本地操作更安全App Store 【适用场景】 摄影党：相机 SD 卡 → OTG 读卡器 → iPhone，拍完立刻导片 内存告急：手机满了，一键把照片视频拷到 U 盘 办公族：会议资料、PPT、PDF U 盘直接打开编辑 自媒体：4K 视频、大素材 手机 U 盘互传，不用电脑 户外 / 无网：景区、工地、出差，脱离电脑随时传文件 【支持设备与系统】 U 盘、读卡器、移动硬盘（exFAT/NTFS 推荐） 立即下载 iStorex，让你的 iPhone 直接拥有 USB 口，随时随地自由传文件！
Screenshots
Verdict
The clearest difference is device support: OTG Flash Pro at 3 against iStorex PRO's 1. OTG Flash Pro also leads on iOS requirement (14.0 vs 16.0). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OTG Flash Pro ships an update every 10 days, iStorex PRO every 11 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | OTG Flash Pro | iStorex PRO |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days — better | Every 11 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 136 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | 裕雨 程 | i-MICA Innovative Technology Co.,Ltd |
In-app purchases
OTG Flash Pro
No in-app purchases
iStorex PRO
No in-app purchases
