Photometrics vs ETC Library
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Photometrics
Access photometric data for ARRI light fixtures, including discontinued models and electronics ballasts. Features include illuminance, beam angle, luminous distribution graphs, and light properties. Tools for comparison, DMX calculations, and product catalogs are also available.
- Photometric data (illuminance, beam angle)
- Luminous distribution graphs
- Light properties (CRI, TM30, TLCI)
- Metric and Imperial units
- Camera exposure information
- Project creation and preset saving
- Lamphead comparison tool
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The ARRI Photometric App gives you the ability to quickly reference the photometric characteristics of all of the ARRI light fixtures. It includes data for discontinued lampheads and our portfolio of Electronics Ballasts (EB). In the Tool section you find more useful resources. Data - Photometrics incl illuminance and beam angle and diameter - Luminous Distribution Graph - Light Properties like technical specification and color metrics (CRI, TM30, TLCI) - Metric and Imperial Units - Camera Exposure and Aperture Information - Create projects and save preset fixtures - Bulb Selection Tools - Compare Lampheads - DMX Implementation Tables - DMX Conversion Calculator - CCL Calculator - Product Catalogue
ETC Library
Access technical documentation for a wide range of products. Browse and share datasheets, application sheets, and brochures organized by product family. This virtual binder provides quick access to essential product information.
- Access to hundreds of technical documents
- Organized by product family and category
- View datasheets, application sheets, and brochures
- Easy document sharing
- Offline access to downloaded documents
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ETC Library gives you quick and easy access to ETC’s technical documentation. This virtual binder lets you view, share datasheets, application sheets, brochures and more for all of ETC’s products – anytime, anywhere. Key features • Access to hundreds of documents, including all ETC datasheets • Material organized by product family and category for easy browsing • Share documents easily (Please note: This application intended to deliver basic technical information about ETC’s products and product families. If you are searching for more information than what is provided in this app, please visit www.etcconnect.com.)
Screenshots
Verdict
The clearest difference is review sentiment: Photometrics at 67% against ETC Library's 0%. Photometrics also leads on rating (4.3 vs 3.8) and iOS requirement (15.6 vs 17). ETC Library's advantage is update cadence (every 3 months vs every 5 months). On price, ratings volume, 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.
Photometrics holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 67% of Photometrics's written reviews are positive against 0% of ETC Library's.
Photometrics ships an update every 5 months, ETC Library every 3 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.
| Parameter | Photometrics | ETC Library |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (7 ratings) — better | 3.8 (4 ratings) |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 7 — better | 4 |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17 |
| Further details — not scored | ||
| Size | 105 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | ARRI Group | Electronic Theatre Controls, Inc. |
Customer experience
Photometrics
ETC Library
In-app purchases
Photometrics
No in-app purchases
ETC Library
No in-app purchases
Questions
Is Photometrics free?
Is ETC Library free?
Which has better reviews, Photometrics or ETC Library?
Do Photometrics or ETC Library have ads?
Which is updated more often, Photometrics or ETC Library?
Other comparisons
