Lghtmtr vs RETO3D
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lghtmtr
This app provides a minimalist light meter to help users determine ideal exposure settings for photography. It visually demonstrates the relationship between ISO, aperture, and shutter speed, making it intuitive for learning photographers.
- Minimalist light meter
- Intuitive exposure settings
- Visual feedback
- Adjustable ISO, aperture, shutter speed
- Camera profile customization
- Scene reference with readings
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Lghtmtr is a beautifully simple light meter that helps you find — and understand — the ideal exposure settings for a scene. Built for film photographers and anyone learning the craft, it makes the relationship between ISO, aperture, and shutter speed feel intuitive and the visual feedback helps reinforce the connection between them. Take a reading, get your settings, and start exploring. Adjust one value and the others respond instantly. Lock settings to experiment and see how each change affects your exposure. You can easily add camera profiles to the app to limit the possible values to what's most relevant to your camera and lens combination. With a visual reference of the scene behind every reading, Lghtmtr helps you shoot with clarity and confidence.
RETO3D
Create engaging 3D effect videos using three photos and a chosen focus point. Customize your creations with various frames and easily share them on social media. Unlock more features with the premium version.
- Generate 3D effect videos
- Select focus point in photos
- Apply various frames
- Crop and rotate video
- One-tap social sharing
- Unlock premium features
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RETO3D APP - a perfect accessory to go along with our RETO3D film camera - assists you in generating videos with 3D effect. Simple and fun! RETO3D allows you to make videos with 3D effect, focusing a center point upon your decision. Various frames are also available to customize your creation. Easy Workflow: 1. Select and upload 3 photos 2. Choose 1 focus point in each photo 3. Crop and rotate the video upon your wish 4. Save and share your creation Remember to share with your friends on social platforms in just one tap! UNLOCK more features, download RETO3D PREMIUM! Leave us reviews to help us do better! To purchase RETO3D film camera, please go to website www.retoproject.com. Contact Email: info@retoproject.com Instagram: @reto.project
Screenshots
Verdict
The clearest difference is review sentiment: Lghtmtr at 80% against RETO3D's 35%. Lghtmtr also leads on rating (4.6 vs 3.2) and ratings volume (167 vs 37). RETO3D's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 3 months). On price and ads 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. Lghtmtr sells 1 one-off in-app purchase. RETO3D asks for nothing beyond the download.
Lghtmtr holds the better App Store score, 4.6 against 3.2. Both are backed by a comparable volume of ratings — 167 and 37 respectively. Written reviews point the same way: 80% of Lghtmtr's written reviews are positive against 35% of RETO3D's.
Lghtmtr ships an update every 3 months, RETO3D monthly. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.
| Parameter | Lghtmtr | RETO3D |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (167 ratings) — better | 3.2 (37 ratings) |
| Positive reviews | 80.0% of reviews — better | 35.3% of reviews |
| Number of ratings | 167 — better | 37 |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 291 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Jacque | RETO PRODUCTION LIMITED |
Customer experience
Lghtmtr
RETO3D
In-app purchases
Lghtmtr
- Coffee tip$4.99
RETO3D
No in-app purchases
