Comparison

uSpectrumX vs VVMS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

uSpectrumX

Features

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uSpectrumX is a wireless controller application for UPRTek handheld spectrometer which provides 6 main features, namely Basic, Spectrum, CIE1931, CIE1976, CRI, and TM-30. Supported Devices ・MK350S Premium (≧ FW Ver.1.1.0.B24) ・MK350N Premium (≧ FW Ver.1.1.1.B6) # uSpectrumX will continuously add more supported devices in the future. Connect to Handheld Spectrometer via Wi-Fi ・To remotely analyze light source target. ・To remotely configure the "Integration Mode" of device ・To remotely run "Dark Calibration" of device. ・To save the captured data of device. More Features ・To show Spectrum, CIE1931, CIE1976, CRI, TM-30 diagram of the data(*.xls), which was generated from UPRTek handheld spectrometer. ・To see more detail information of light source, such as LUX, CCT, CRI, x, y, λp, and λpV. ・To share the measured data via email. ・To choose uSpectrumX to open UPRTek xls file from other apps.

About

VVMS

Features

Read full description

"VVMS" allows you to master vehicle location, vehicle status and driver status at any time; At the same time, you can also query the historical operation of the vehicle.

Screenshots

uSpectrumX4 screens

VVMS4 screens

Verdict

The call

The clearest difference is iOS requirement: uSpectrumX at 9.0 against VVMS's 13.0. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

uSpectrumX ships an update every 3 months, VVMS every 5 weeks. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 5 level

uSpectrumX versus VVMS: the parameters behind the verdict, then further details
Parameter	uSpectrumX	VVMS
Price	Free	Free
Update frequency	Every 3 months	Every 5 weeks — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	9.0 — better	13.0
Further details — not scored
Size	25 MB	148 MB
Age rating	4+	4+
Developer	United Power Research Technology Corporation	杰姜

In-app purchases

None

uSpectrumX

No in-app purchases

None

VVMS

No in-app purchases

Questions

Is uSpectrumX free?

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

Is VVMS free?

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

Do uSpectrumX or VVMS have ads?

Neither uSpectrumX nor VVMS shows ads.

Which is updated more often, uSpectrumX or VVMS?

uSpectrumX ships an update every 3 months, and VVMS every 5 weeks. Most recently, uSpectrumX was updated on October 4, 2026 and VVMS on October 7, 2026.