# Strontium vs NIMBUS Watch Private Cloud

The clearest difference is in-app purchases: NIMBUS Watch Private Cloud at none against Strontium's 2. Strontium's advantage is iOS requirement (8.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Strontium sells 2 one-off in-app purchases. NIMBUS Watch Private Cloud asks for nothing beyond the download.

Strontium ships an update every 5 months, NIMBUS Watch Private Cloud every 3 months. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Strontium | NIMBUS Watch Private Cloud |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (4 ratings)](https://appshunter.io/ios/app/strontium/id1050123100/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 10.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 132 MB | 17 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [i-FlashDrive Inc.](https://appshunter.io/developer/1387757454) | [Quanta Computer Inc.](https://appshunter.io/developer/506596827) |

## What reviewers say

### Strontium

[App page](https://appshunter.io/ios/app/strontium/id1050123100)

Easily manage and transfer photos, music, videos, and files between your Apple devices. Offers secure storage, direct media playback, and backup options for contacts and your camera roll.

**Highlights:** Secure data storage, Direct media playback, Backup and restore contacts, Lightning transfer between devices, Auto file management, Supports numerous file formats

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calendar Backup | Free | one-time |
| Zip/unzip files support | $0.99 | one-time |


### NIMBUS Watch Private Cloud

[App page](https://appshunter.io/ios/app/nimbus-watch-private-cloud/id1069298013)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Strontium free?

Strontium is free to download, with in-app purchases available.

### Is NIMBUS Watch Private Cloud free?

NIMBUS Watch Private Cloud is free to download, with no in-app purchases.

### Do Strontium or NIMBUS Watch Private Cloud have ads?

Neither Strontium nor NIMBUS Watch Private Cloud shows ads.

### Which is updated more often, Strontium or NIMBUS Watch Private Cloud?

Strontium ships an update every 5 months, and NIMBUS Watch Private Cloud every 3 months. Most recently, Strontium was updated on November 6, 2026 and NIMBUS Watch Private Cloud on November 11, 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.*