Strontium vs I
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Strontium
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.
- Secure data storage
- Direct media playback
- Backup and restore contacts
- Lightning transfer between devices
- Auto file management
- Supports numerous file formats
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Strontium app is the best way to manage all your photos, music, videos and files to or between your iPhone, iPad and iPod. Features and Benefits: - Secured data storage - Direct playback of videos and songs - Backup and restore contacts and camera roll - Lightning transfer between iPhone, iPad and iPod - Free app for auto file management and security Compatible with Strontium hardware: - Strontium iOS Lightning Card Reader Supported File Formats: Document: Pages, Numbers, Keynote, doc, docx, xls, xlsx, ppt, pptx, rtf, txt, html, pdf Image: jpg, png, bmp, gif, tif, tiff, ico, xbm, cur Audio: mp3, aac, aif, aiff, wav, m4a, caf Video: mp4, mov, m4v (without DRM), mkv, avi, flv, rm, rmvb, wmv, vob, 3gp Other: zip (In-App Purchase required) To experience more of our memory products visit www.strontium.biz
I
Manage all your files on iOS devices with ease. This app allows you to exchange files between different devices and platforms, back up contacts and camera roll, and play media directly from your device. It supports a wide range of document, image, audio, and video file formats.
- File management for iOS devices
- Cross-device file exchange
- Contact and camera roll backup
- Video and music playback
- Image and document preview
- Support for various file formats
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The I-USBKey Pro is the best way to manage all your files on iOS devices,Exchanges files with different devices & platforms with ease. 1.Backup Contacts and Camera Roll. 2.Play Videos,Musics. 3.Preview Images,World. Supported File Formats: Document:DOC,XLS,PPT,TXT,else; Image:JPG,JPEG,BMP,GIF,else; Audio:MP3,AAC,AIF,else; Video:MP4,MOV,MKV,AVI,FLV,RMVB,ELSE;
Screenshots
Verdict
The clearest difference is rating: I at 5.0 against Strontium's 1.8. I also leads on review sentiment (50% vs 11%) and in-app purchases (none vs 2). On price, ratings volume, ads and device support 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. Strontium sells 2 one-off in-app purchases. I asks for nothing beyond the download.
I holds the better App Store score, 5.0 against 1.8. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews point the same way: 11% of Strontium's written reviews are positive against 50% of I's.
Strontium ships an update every 5 months, I every 9 days. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.
| Parameter | Strontium | I |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (4 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 10.5% of reviews | 50.0% of reviews — better |
| Number of ratings | 4 | 5 — better |
| Update frequency | Every 5 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 | 8.0 |
| Further details — not scored | ||
| Size | 132 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | i-FlashDrive Inc. | zhong qibiao |
Customer experience
Strontium
I
In-app purchases
Strontium
- Calendar BackupFree
- Zip/unzip files support$0.99
I
No in-app purchases
