X vs Duoptra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
X
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The X-Memo App allows capturing memorable moments right at your fingertips. It works as a remote control of your smart X-Memo camera. It only takes a tap of a button on smart devices to record videos or playback files. Key Features Remote control of X-Memo action camera Intuitive UI design Playback photos and videos Delete the files on microSD card Save photos and videos to your devices Wirelessly update your camera WiFi information Camera Compatibility X-Memo action camera
Duoptra
Capture professional-quality video with simultaneous front and back camera recording. Offers advanced manual controls, pro video formats like ProRes, and built-in editing tools for filmmakers and content creators.
- Simultaneous dual-camera recording
- Pro video formats (ProRes, H.265, H.264)
- Manual ISO, shutter speed, and exposure controls
- Advanced monitoring tools (waveform, focus peaking)
- Built-in video trimming and cropping
- 4K resolution at up to 60fps
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Duoptra is a professional dual-camera app designed for filmmakers, content creators, and anyone who wants full manual control over their iPhone and iPad camera. DUAL CAMERA RECORDING Record from front and back cameras simultaneously. A draggable, resizable picture-in-picture window lets you frame both angles in real-time. Perfect for vlogs, reactions, tutorials, and behind-the-scenes content. PRO VIDEO FORMATS Choose the codec and container that fits your workflow: - H.265 (HEVC) in MOV or MP4 - H.264 (AVC) in MOV or MP4 - Apple ProRes 422 - Apple ProRes 4444 Shoot in resolutions from 720p to 4K at up to 60fps. Dynamic bitrate adapts to your selected codec and resolution for optimal file size and quality. PROFESSIONAL MONITORING TOOLS - Waveform Monitor: Real-time luminance display with overexposure detection - Zebra Overlay: GPU-accelerated animated stripes highlighting overexposed areas - Focus Peaking: Metal-powered edge detection with red highlight overlay - Audio Meter: Stereo level bars with peak hold indicators and dB scale - Rule-of-Thirds Grid: Compose your shots with precision FULL MANUAL CONTROLS - ISO / Gain: Switch between auto and manual with a precise slider - Shutter Speed: From 1/8000s to 1/4s with real-time display - Exposure Bias: Fine-tune exposure from -3.0 to +3.0 EV - Zoom: Pinch or use the scroll wheel, from 1x to 10x with haptic feedback - Tap-to-Focus with visual indicator - Flash toggle - Audio gain adjustment - Video stabilization - Low-light boost BUILT-IN VIDEO EDITOR - Trim your clips with start and end handles - Crop with an 8-handle overlay and aspect ratio lock - Scale up to 5x, pan, rotate in 90-degree steps - Flip horizontal or vertical - View metadata: resolution, codec, duration, frame rate LIBRARY Browse your videos and photos organized by day. Multi-select and delete in bulk. Pull to refresh. Designed for iPhone. Terms of Use: https://mercandalli.com/ios/apps/terms-of-use/Duoptra%20Dual%20Camera
Screenshots
Verdict
The clearest difference is in-app purchases: X at none against Duoptra's 4. X also leads on ads (none vs shown) and iOS requirement (7.0 vs 16.0). Duoptra's advantage is update cadence (every 2 days vs every 3 months). 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. Duoptra sells 3 in-app purchases, starting at $0.99 per 7 days. X asks for nothing beyond the download.
X ships an update every 3 months, Duoptra every 2 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.
| Parameter | X | Duoptra |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.8 (4 ratings) — better |
| Number of ratings | — | 4 — better |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 32 MB | 41 MB |
| Age rating | 4+ | +4 |
| Developer | Autel Intelligent Technology Co., Ltd. | Jonathan Mercandalli |
In-app purchases
X
No in-app purchases
Duoptra
- Full version3 Days trial$0.997 Days
- Full Access Pass3 Days trial$0.991 Month
- Full Access Pass3 Days trial2 variants$4.997 Days









