UMS VMS vs REC Disk Speed Test
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UMS VMS
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REC Disk Speed Test
This utility app tests the write speed of your USB-C external drives on compatible iPhones. It provides a clear verdict on whether your drive can handle demanding video formats like ProRes, ensuring smooth recordings.
- Real write speed measurement (MB/s)
- Color-coded drive readiness verdict
- Format-by-format compatibility breakdown
- File system support check
- Drive details (name, capacity, free space)
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Never lose a shot to a slow drive. Recording ProRes to an external SSD is one of the best things you can do with your iPhone Pro, until the drive can't keep up and your footage stutters, drops frames or stops recording. REC Disk Speed Test tells you whether your drive is up to the job before you hit record. Plug in your USB-C drive, tap Start, and get a clear answer in seconds. WHAT YOU GET • Real write speed: See exactly how fast your drive writes, in MB/s, measured on your own iPhone. • A clear verdict: Color-coded results tell you at a glance whether your drive is ready for everything, most things, or only lighter formats. • Format-by-format breakdown: Check marks for HEVC 4K60, HEVC HDR, and ProRes 10-bit HDR at 1080p30, 4K30 and the demanding 4K60. • File system check: Find out right away whether your drive's format is supported for video capture, so you don't discover a problem on set. • Drive details: Name, capacity and free space, all on one screen. PERFECT FOR • Filmmakers and content creators shooting ProRes on iPhone • Testing a new SSD before a shoot, or before you buy more • Comparing drives, cables and enclosures to find the fastest setup • Peace of mind before an important recording Free, simple, and built by the team behind REC and Photon Camera. FROM LATENITESOFT Pair your tested drive with REC to record cinematic video in any format straight to external storage, or with Photon Camera to shoot stunning photos directly to your drive. Requires iPhone 15 Pro or a later Pro model with USB-C external storage support.
Screenshots
Verdict
The clearest difference is update cadence: UMS VMS at every 2 months against REC Disk Speed Test's every 37 months. UMS VMS also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price, 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.
UMS VMS ships an update every 2 months, REC Disk Speed Test every 37 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | UMS VMS | REC Disk Speed Test |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.3 (6 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 2 months — better | Every 37 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 121 MB | 1 MB |
| Age rating | 4+ | 17+ |
| Developer | BEST ALLIANCE COMPANY LIMITED | LateNiteSoft S.L. |
In-app purchases
UMS VMS
No in-app purchases
REC Disk Speed Test
No in-app purchases
Questions
Is UMS VMS free?
Is REC Disk Speed Test free?
Do UMS VMS or REC Disk Speed Test have ads?
Which is updated more often, UMS VMS or REC Disk Speed Test?
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