Theta vs Lux Light Meter Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Theta
This application connects to specialized devices to measure and display galvanic skin response. It utilizes Wi-Fi and Bluetooth 4.0BLE to collect data on skin conductance, providing insights into physiological responses.
- Galvanic skin response measurement
- Wi-Fi connectivity
- Bluetooth 4.0BLE connection
- Skin conductance data display
- Physiological response tracking
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Application displays data from Theta-Meter devices (Wi-Fi and Bluetooth 4.0BLE connection) which measures human body galvanic skin response. Skin conductance, also known as galvanic skin response (GSR), electrodermal response (EDR), psychogalvanic reflex (PGR), skin conductance response (SCR) or skin conductance level (SCL), is a method of measuring the electrical conductance of the skin.
Lux Light Meter Pro
Measure light intensity in lux and foot candles with this 2-in-1 meter. Optimize photography settings, adjust indoor lighting, or prevent eye strain with professional-quality readings directly from your smartphone.
- Real-time lux and foot candle measurements
- Real-time color temperature measurements
- Real-time histogram plotting
- Customizable settings for shutter speed, ISO, aperture
- Front and back camera support
- Intuitive and customizable controls
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Light Meter is a 2-in-1 light intensity (lux) and exposure meter with customizable settings. Whether you want to capture the perfect photo or optimize lighting in any space, Light Meter provides professional-quality readings right on your phone. Forget about expensive professional equipment that you have to carry around. With Light Meter, you can get light intensity data with just one click to choose the best settings for manual or film photography, adjust home, work, or greenhouse lighting, and prevent eye strain from poor lighting. Features: - intuitive and customizable controls - for front and back cam - collects light intensity data in real time - instant lux and foot candle measurements - real-time color temperature measurements - real-time histogram plotting - customizable settings for shutter speed, ISO, aperture - preview and adjust diaphragm settings before shooting Have any questions or suggestions? Write to us: sparkappsfeedback@gmail.com Terms of Use - https://www.iubenda.com/terms-and-conditions/82717056 Privacy Policy - https://www.iubenda.com/privacy-policy/82717056
Screenshots
Verdict
The clearest difference is review sentiment: Theta at 100% against Lux Light Meter Pro's 21%. Theta also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 4). Lux Light Meter Pro's advantage is ratings volume (5.2K vs 1). On price 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. Lux Light Meter Pro sells 3 in-app purchases, starting at $1.99 per month. Theta asks for nothing beyond the download.
Theta holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Lux Light Meter Pro has 5.2K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Theta's written reviews are positive against 21% of Lux Light Meter Pro's.
Theta ships an update monthly, Lux Light Meter Pro every 3 months. Both last shipped on October 29, 2026.
| Parameter | Theta | Lux Light Meter Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.9 (5.2K ratings) |
| Positive reviews | 100.0% of reviews — better | 21.2% of reviews |
| Number of ratings | 1 | 5.2K — better |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15 |
| Further details — not scored | ||
| Size | 13 MB | 19 MB |
| Age rating | 12+ | 4+ |
| Developer | Mikhail Fedorov | Marina Polyanskaya |
Customer experience
Theta
Lux Light Meter Pro
Bugs and requests
Theta
Not enough reviews yet to summarise bugs or requests.
Lux Light Meter Pro
Reported bugs
3 issues- Readings stuck at 0 lux regardless of light conditions
- Frequent crashes and freezes
- Inability to switch between front and rear cameras
Requested features
3 requests- Ability to save and review past measurements
- More detailed instructions and guidance on proper usage
- Improved accuracy and calibration options
In-app purchases
Theta
No in-app purchases
Lux Light Meter Pro
- Premium Access3 Days trial$1.991 Month
- Premium Access2 variants$14.991 Year
- Pro Mode$9.99
Questions
Is Theta free?
Is Lux Light Meter Pro free?
Which has better reviews, Theta or Lux Light Meter Pro?
Do Theta or Lux Light Meter Pro have ads?
Which is updated more often, Theta or Lux Light Meter Pro?
Other comparisons
