# Serial vs OTG Cloud by Monster Digital

The clearest difference is price: OTG Cloud by Monster Digital at Free against Serial's $2.99. OTG Cloud by Monster Digital also leads on update cadence (every 5 weeks vs every 7 months) and iOS requirement (6.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

OTG Cloud by Monster Digital is free to download; Serial costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Serial ships an update every 7 months, OTG Cloud by Monster Digital every 5 weeks. Both last shipped on November 1, 2026.

## The numbers

| Metric | Serial | OTG Cloud by Monster Digital |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[2.4 (60 ratings)](https://appshunter.io/ios/app/otg-cloud-by-monster-digital/id891237140/reviews)** |
| Number of ratings | — | **60** |
| Positive reviews | — | 16.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 5 MB | 17 MB |
| Requires iOS | 15.6 | **6.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ralph Cos](https://appshunter.io/developer/573505028) | [SDJ Technologies, Inc](https://appshunter.io/developer/891237143) |

## What reviewers say

### Serial

[App page](https://appshunter.io/ios/app/serial-sum-trainer/id577884595)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OTG Cloud by Monster Digital

[App page](https://appshunter.io/ios/app/otg-cloud-by-monster-digital/id891237140)

Wirelessly access and share media from SD cards, USB drives, and hard drives on your Apple devices. Stream content, back up files, and even create a Wi-Fi hotspot. The device also functions as a power bank for other gadgets.

**Highlights:** Wireless media access, File sharing, Video and music streaming, File backup, Wi-Fi hotspot creation, Power bank functionality

**In-app purchases:** none

**What reviewers like**

- 🔋 Can still be used as a power bank
- 🌐 Useful as a Wi-Fi router/repeater in hotels
- 💳 Can function as a memory card reader

**What reviewers complain about**

- ❌ No longer supported by developers
- 🚫 Incompatible with newer iOS versions
- 🧱 Device becomes a brick without app support
- ⏳ Outdated software and limited file format support
- 🐌 Slow file transfer speeds

**Reported bugs**

- App no longer works with iOS 11 and later
- Cannot transfer files by plugging in phone
- Music player stops after one song
- Video plays only in portrait mode
- App freezes when accessing media server

**Requested features**

- Update the app for current iOS versions
- Support 'Open In...' functionality for all file types
- Improve music player functionality (playlists, continuous play)
- Enable landscape mode for video playback
- Allow import/export of all file types


## Frequently asked questions

### Is Serial free?

Serial costs $2.99, with no in-app purchases.

### Is OTG Cloud by Monster Digital free?

OTG Cloud by Monster Digital is free to download, with no in-app purchases.

### Do Serial or OTG Cloud by Monster Digital have ads?

Neither Serial nor OTG Cloud by Monster Digital shows ads.

### Which is updated more often, Serial or OTG Cloud by Monster Digital?

Serial ships an update every 7 months, and OTG Cloud by Monster Digital every 5 weeks. Most recently, Serial was updated on November 1, 2026 and OTG Cloud by Monster Digital on November 1, 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.*