uSpectrum PAR vs CameraKeep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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.
CameraKeep
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | uSpectrum PAR | CameraKeep |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 8 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 25 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | United Power Research Technology Corporation | Ryo Tsudukihashi |
In-app purchases
uSpectrum PAR
No in-app purchases
CameraKeep
- Premium (Weekly)$0.997 Days
- Premium (Lifetime)$19.99









