STPRO vs Light Meter LuMe
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STPRO
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Cette application vous permet de contrôler et paramétrer le stabilisateur pour caméra d'action STPRO1 de TecTecTec. Le stabilisateur est compatible avec les caméras d'action XPRO1, XPRO2(+), XPRO3, XPRO4(+) et caméra GoPro.
Light Meter LuMe
This app acts as a professional light meter and exposure calculator for film photographers. It offers various metering modes, reciprocity correction for different film stocks, and depth of field calculations. It aims to replace multiple handheld tools with a single, convenient app.
- Multiple metering modes (Matrix, Center-weighted, Spot, Zone System)
- Multi-point spot metering with contrast evaluation
- Reciprocity correction for various film stocks
- Depth of field and hyperfocal distance calculator
- Flash guide number calculator
- Live exposure tools including histogram and clipping warnings
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LuMe is a pro-grade light meter and exposure calculator built for film photographers. Whether you're shooting medium format on a Mamiya, large format on a 4×5, or 35mm on a Leica, LuMe gives you the exposure intelligence your film camera doesn't have. METERING MODES FOR EVERY SITUATION • Matrix — averages the whole scene for balanced exposures • Center-weighted — emphasizes the middle, like a classic SLR meter • Spot — measures a small area you tap, just like a 1° spot meter • Zone System — Ansel Adams' tonal mapping (Zones I–IX) right in your viewfinder MULTI-POINT SPOT METERING Place up to four spot markers anywhere on your scene. Read each EV at a glance, evaluate contrast range, and place tones with intention. LIDAR SPOT DISTANCE (on Pro devices) See the physical distance to any metered spot — useful for hyperfocal setup and verifying focus on rangefinders and manual-focus lenses. RECIPROCITY CORRECTION FOR EVERY FILM STOCK Long exposures don't behave linearly on film. LuMe applies the Schwarzschild exponent for your stock — Tri-X, TMax, Portra, Ektar, Velvia, and more — so you don't need printed tables in your bag. DEPTH OF FIELD CALCULATOR Hyperfocal distance, near limit, far limit — for 35mm, APS-C, medium format (6×4.5, 6×6, 6×7), and large format (4×5). One tap. FLASH GUIDE NUMBER CALCULATOR GN, distance, power fraction → f-stop. Solved. LIVE EXPOSURE TOOLS • Histogram overlay • Highlight/shadow clipping warnings • ND filter compensation • Aperture priority & shutter priority • Exposure compensation dial • ISO and shutter range constraints (cap at your film speed) BUILT FOR THE WAY FILM PHOTOGRAPHERS ACTUALLY SHOOT • Spot meter a high-contrast scene; place highlights on Zone VII • Apply reciprocity for a 30-second exposure on Tri-X • Calculate hyperfocal for landscape work on Portra 400 • Verify a flash setup before burning a frame LuMe replaces your handheld meter, reciprocity card, DoF chart, and flash calculator with one tool that fits in your camera bag. Available in 16 languages: English, German, French, Spanish, Italian, Portuguese, Dutch, Swedish, Polish, Turkish, Russian, Arabic, Japanese, Korean, Chinese (Simplified & Traditional). LUME PRO • $6.99 USD for lifetime access Privacy policy: https://lume.contraststudio.app/privacy.html Terms of Use: https://lume.contraststudio.app/terms.html
Screenshots
Verdict
The clearest difference is in-app purchases: STPRO at none against Light Meter LuMe's 2. STPRO also leads on iOS requirement (8.0 vs 16.0). Light Meter LuMe's advantage is update cadence (every 5 days vs monthly). On price, ads 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. Light Meter LuMe sells 1 one-off in-app purchase. STPRO asks for nothing beyond the download.
STPRO ships an update monthly, Light Meter LuMe every 5 days. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.
| Parameter | STPRO | Light Meter LuMe |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (17 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 17 — better |
| Update frequency | Monthly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 5 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | KERTEC EURL | Contrast Studio |
In-app purchases
STPRO
No in-app purchases
Light Meter LuMe
- LuMe Pro Lifetime2 variants$6.99





