# SL Udisk vs OTG Flash Pro

The clearest difference is update cadence: OTG Flash Pro at every 10 days against SL Udisk's every 6 weeks. SL Udisk's advantage is iOS requirement (8.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SL Udisk ships an update every 6 weeks, OTG Flash Pro every 10 days. The most recent releases landed on October 9, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SL Udisk | OTG Flash Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/sl-udisk/id1137419219/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 25 MB | 136 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Shiling Digital Technology.co., Ltd](https://appshunter.io/developer/1137419218) | [裕雨 程](https://appshunter.io/developer/1079877476) |

## What reviewers say

### SL Udisk

[App page](https://appshunter.io/ios/app/sl-udisk/id1137419219)

Expand your iOS device's storage with this portable flash drive. Seamlessly transfer, view, and manage files between your iOS devices and computers without needing Wi-Fi or a network signal. It offers file encryption and contact backup for added security and convenience.

**Highlights:** Two-way storage between iOS and MAC/PC, No Wi-Fi or network signal required, Seamless file transfer, viewing, and sharing, Organize, edit, and manage files, Play music and videos directly from the drive, File encryption, Contacts backup and restore

**Features:** macOS Compatibility

**In-app purchases:** none


### OTG Flash Pro

[App page](https://appshunter.io/ios/app/otg-flash-pro/id6752880818)

**In-app purchases:** none


## Frequently asked questions

### Is SL Udisk free?

SL Udisk is free to download, with no in-app purchases.

### Is OTG Flash Pro free?

OTG Flash Pro is free to download, with no in-app purchases.

### Do SL Udisk or OTG Flash Pro have ads?

Neither SL Udisk nor OTG Flash Pro shows ads.

### Which is updated more often, SL Udisk or OTG Flash Pro?

SL Udisk ships an update every 6 weeks, and OTG Flash Pro every 10 days. Most recently, SL Udisk was updated on October 9, 2026 and OTG Flash Pro on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*