Predilux vs CameraTestSlate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Predilux
This app helps photographers and videographers predict light exposure based on light source and distance. It also allows inverse measurement of distance by specifying exposure, considering various camera and light source settings, and gels.
- Predict light exposure
- Measure distance to light source
- Adjust camera settings (FPS, ISO, Shutter)
- Configure light source settings
- Apply gel effects (Diffusion, CTO/CTB, +- Green)
- Experimentally verified results
Read full descriptionHide full description
Predilux lets you predict the exposure (key light) measured by a light meter, by choosing a light source and a distance. Or inversely measure the distance to the light source by specifying the exposure. Predilux takes into account camera settings (FPS, ISO, Shutter), source settings (Focalization, Lens, Grid, etc.) and gels (Diffusion, CTO/CTB, CTS, +- Green, and dozen of effects). All results have been experimentally verified with a light meter in rental shops. Predilux does not rely on constructor’s data. IMPORTANT NOTICE: Predilux is switching its pricing model to a monthly subscription. Starting Sept 1st 2023, Predilux will cost $14.99/year or $1.49/mo (cancel anytime). If you buy Predilux now, you will be eligible for 2 years free. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
CameraTestSlate
Read full descriptionHide full description
CameraTestSlate turns your iPhone®, iPad®, or Mac® into a wireless data slate so you can update on-camera test info from behind the camera. Info resizes to fit the space available. CameraTestSlate is color-balanced for 3200 K, 4300K, 5600 K, or 6500 K (and can show that color temperature onscreen), and you can choose light or dark mode slates. Completely free. No in-app purchases; no tracking; no data collection.
Screenshots
Verdict
The clearest difference is in-app purchases: CameraTestSlate at none against Predilux's 1. Predilux's advantage is update cadence (every 4 months vs every 11 months) and iOS requirement (12.0 vs 15.0). 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. Predilux sells 1 in-app purchase, starting at $14.99 per year. CameraTestSlate asks for nothing beyond the download.
Predilux ships an update every 4 months, CameraTestSlate every 11 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.
| Parameter | Predilux | CameraTestSlate |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (2 ratings) — better | — |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 69 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | WID LLC | Adam Wilt |
In-app purchases
Predilux
- Predilux$14.991 Year
CameraTestSlate
No in-app purchases
