Comparison

uSpectrum PAR vs CameraKeep

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

Head to head
About

uSpectrum PAR

This application connects wirelessly to a handheld spectral PAR meter, allowing remote analysis and configuration of light sources. It displays detailed spectral data, light source information, and absorption metrics, with options to save and share measurements.

Highlights
  • Wireless Bluetooth connection
  • Remote light source analysis
  • Save captured data
  • Display spectrum and CIE diagrams
  • View light source metrics (LUX, CCT, CRI)
  • Share measured data via email
Features
Read full description

uSpectrum PAR is a wireless controller application for UPRtek handheld Spectral PAR Meter which provides 6 main features, namely Basic, Spectrum, PPFD Spectrum, CIE1931, CIE1976, and, CRI. Supported Devices ・PG200N (≧ FW Ver.1.1.0.B25) # uSpectrum PAR will continuously add more supported devices in the future. Connect to Handheld Spectral PAR Meter via Bluetooth ・To remotely analyze light source target. ・To remotely configure the "Integration Mode" of device ・To save the captured data of device. More Features ・To show Spectrum, PPFD Spectrum, CIE1931, CIE1976, CRI diagram of the data(*.xls), which was generated from UPRTek handheld spectral PAR meter. ・To see more information of light source, such as LUX, CCT, CRI, x, y, λp, and λpV. ・To see more information of absorption of light source, such as PPFD, PFD, PFD-R, PFD-G, and, PFD-B. ・To share the measured data via email.

About

CameraKeep

Features
Read full description

Keep your gear in top condition, always. "When did I last clean the sensor?" "Is that fungus on my lens?" Your gear deserves better — let CameraKeep handle your care timing. ■ Dual tracking: shots x time Sensor cleaning "in N shots," lens cleaning and dry-box humidity "in N days." Log a shoot and it updates your total shots, so shutter-based care is spot on. ■ Dry box & fungus prevention Lens fungus is a photographer's nemesis. Get reminders to check dry-box humidity and replace desiccant. Keep it at 40-50% to protect your lenses. ■ Preset care items Sensor cleaning, lens cleaning, contact cleaning, dry-box humidity, desiccant, firmware, battery check, weather-seal check, AF calibration, full cleaning — in real photographer language, with recommended intervals you can fully customize. ■ A collection with a care log Register bodies and lenses with photos. Every care builds your history, and you can record costs too. ■ Three-stage reminders A heads-up as it approaches, on the day, and gently every day after until it's done. Overdue care leads to mold and faults. Never miss it. ■ Tips for photographers Blower before wiping, dry box at 40-50%, rear-element fungus hurts most — 24 tips and a mascot make care more fun. ■ Widget support See which gear needs care next and what's left (in shots or days) at a glance on your Home Screen. [Free] • Register 1 piece of gear • Up to 3 care items • Care reminders [Premium] • Unlimited gear • Unlimited care items • Full history & shoot log • Group by storage • No ads One-time $20 or $1.49/week (no free trial). Subscriptions auto-renew and are billed to your Apple ID unless canceled at least 24 hours before the period ends. Cancel anytime in Settings. Care intervals are general guides. Adjust them to your shooting style and preferences. ■ LINKS • Support: https://tsuzukit.com/contact/ • Terms of Service: https://tsuzukit.com/legal/terms-of-service.html • Privacy Policy: https://tsuzukit.com/legal/privacy-policy.html

Screenshots

uSpectrum PAR4 screens
CameraKeep3 screens

Verdict

The call

The clearest difference is in-app purchases: uSpectrum PAR at none against CameraKeep's 2. uSpectrum PAR also leads on ads (none vs shown) and device support (3 vs 1). CameraKeep's advantage is update cadence (every 3 months vs every 8 months). On price 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. CameraKeep sells 2 in-app purchases, starting at $0.99 per 7 days. uSpectrum PAR asks for nothing beyond the download.

UpkeepUpdate frequency

uSpectrum PAR ships an update every 8 months, CameraKeep every 3 months. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

Scorecard5 real differences · 4 level
uSpectrum PAR versus CameraKeep: the parameters behind the verdict, then further details
ParameteruSpectrum PARCameraKeep
PriceFreeFree
Rating1.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 8 monthsEvery 3 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS9.0 — better17.0
Further details — not scored
Size25 MB6 MB
Age rating4+4+
DeveloperUnited Power Research Technology CorporationRyo Tsudukihashi

In-app purchases

None

uSpectrum PAR

No in-app purchases

2 purchases

CameraKeep

Subscriptions1
  • Premium (Weekly)$0.997 Days
One-time1
  • Premium (Lifetime)$19.99

Questions

Is uSpectrum PAR free?
uSpectrum PAR is free to download, with no in-app purchases.
Is CameraKeep free?
CameraKeep is free to download, with in-app purchases available.
Do uSpectrum PAR or CameraKeep have ads?
CameraKeep shows ads; uSpectrum PAR does not.
Which is updated more often, uSpectrum PAR or CameraKeep?
uSpectrum PAR ships an update every 8 months, and CameraKeep every 3 months. Most recently, uSpectrum PAR was updated on November 3, 2026 and CameraKeep on November 10, 2026.

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