StereoPix vs MPO Viewer
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
StereoPix
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SEE YOUR WORLD IN DEPTH StereoPix turns your iPhone into a stereoscopic 3D camera. Take two photos of the same scene, and StereoPix pairs them into a side-by-side stereo image you can free-view, share, or narrate over in a recorded video. StereoPix lets you zoom in close to the smallest details. The fuzz on a bee, the curl of a petal, the tiny textures that flat photos miss all pop with real depth. No extra hardware, no glasses, no gimmicks. Just real 3D from the camera already in your pocket. HOW IT WORKS Take your first photo. Shift the camera slightly and line up your second shot using the ghost overlay. Your first photo floats over the live camera view so you can match the framing perfectly. Adjust the overlay opacity with a slider until alignment feels effortless. View your pair instantly in the side-by-side stereo viewer. A SMARTER STEREO VIEWER Linked zoom and pan. Pinch or drag on either side and both images move together in perfect sync, so the 3D effect never breaks. Swap left and right with one tap for cross-view or parallel free-viewing, whichever works for your eyes. Fine-tune alignment after the shot. Adjust your pair right in the viewer until the depth locks in, no need to reshoot. Works with portrait and landscape pairs. RECORD AND SHARE Export your stereo pair as a single side-by-side image, ready to share anywhere. Export a wigglegram, an animated wobble between your two shots that shows off the 3D effect on any screen. No free-viewing skills needed, perfect for social. Record a video of your pair with live narration. Zoom, pan, and talk through your shot while StereoPix captures it all, then saves straight to your Photos library. YOUR STEREO LIBRARY Every pair you capture is saved to your in-app library. Browse your collection, reopen any pair in the viewer, and keep building your 3D archive. WHY STEREO PHOTOGRAPHY Stereo photography is over 150 years old, and it still feels like magic. Two slightly different views of the same scene, one for each eye, and your brain does the rest. StereoPix makes the classic technique effortless with modern tools like the ghost overlay and linked viewing, so anyone can shoot convincing 3D on the first try. Great for: Macro shots of insects and flowers, where zooming reveals incredible depth Travel and landscapes with dramatic depth Product shots and collectibles Family moments you want to remember in three dimensions No account. No subscription. No ads. Just point, shoot twice, and see your photos come alive.
MPO Viewer
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A box of Keystone cards, a Fujifilm FinePix and a phone: MPO Viewer brings them together. It opens stereo photographs and stereo video straight from the camera, with no conversion and no computer, and lets you look at them the way they were meant to be seen. Through a viewer, with coloured glasses, or together on the television. A dual-lens camera such as the FinePix REAL 3D W1 or W3 writes every photograph to the card as an .mpo with both eyes inside it, and films in .avi. Point the app at a folder on your device or in iCloud Drive and they are all in one place, in a grid or a table, searchable. Keep them apart in as many folders as you like: each has its own captions, hidden photographs and playlists, and the name at the top of the grid switches between them. Six ways to look ⢠Side by Side: the classic pair, for free viewing or a stereoscope, from a Holmes to an OWL ⢠Crossed Eye: the same pair swapped, for anyone who crosses their eyes ⢠Anaglyph: both eyes in one picture for coloured glasses, red/cyan, magenta/green, amber/blue or red/blue, with ghost reduction ⢠Cardboard: the pair bent so the lenses of a cheap VR viewer straighten it out again; set it to your own viewer once ⢠Wiggle: the two eyes flicker back and forth, on a timer or as you tilt the phone ⢠Depth: a depth map built from the pair, moving along as you tilt Cardboard and Depth are marked experimental. Clips play with sound in the first four. Whichever you pick, the pair is put straight first: the eyes brought into line, the nearest thing placed at the screen plane. That is the difference between depth and a headache. Watching together A few red/cyan glasses and a television, and the whole room joins in. Mirror to an Apple TV or AirPlay screen, or plug in HDMI: the picture moves to the big screen and the phone becomes the remote. A strip of thumbnails under the photograph holds the whole folder, the one on the television in the middle: look ahead without the room noticing, and tap to send one over. Swipe through them or start a slideshow, which carries on from whatever you pick. Set the depth once per television and every photograph sits right on that screen from then on. Old cards A stereo card from 1900 becomes an MPO here like any other. Photograph one inside the frame the app draws, or hand it a scan to convert: it finds the two prints, straightens them, lays them on each other and takes out the colour cast. Every card then has three buttons of its own: turn it over, put the light back, or keep it without colour. And if you like, a model running on the device itself will colour it in. The card is never touched. A picture that already holds the pair side by side goes in the same way, and so does an anaglyph: that one the app takes back apart into its two views, in grey, the depth unchanged. Framing, keeping, sharing Put a photograph in a border in the colour you choose, or in one of six passepartouts, from a stereo card to a cardboard peep box, with a caption in a colour of its own. Save a selection as a playlist, in your order or shuffled. Side by Side, Crossed Eye and Anaglyph go out as PNG or JPEG, Wiggle as a GIF or a video, Depth as a tilt in MP4, and a clip as MP4 at three sizes. Exports carry a watermark; MPO Viewer Pro takes it off. And the rest A photograph you hide stays hidden, behind Face ID if you want. An info button tells you what the camera recorded, down to lens, aperture, shutter and ISO, with a map when there is a location. All of it works with VoiceOver and with the largest text sizes. With Reduce Motion on, Wiggle and Depth follow your tilt instead of moving by themselves, and those two also work with one eye. Your photographs do not leave your device. No accounts, no analytics, nothing looking over your shoulder. The one thing the app ever fetches is a larger colour model, and only when you ask for it. In English and Dutch. For anyone who finds a box of old stereo photographs again, and anyone who still makes them.
Screenshots
Verdict
The clearest difference is iOS requirement: StereoPix at 15.0 against MPO Viewer's 26.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. StereoPix sells 1 one-off in-app purchase and MPO Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | StereoPix | MPO Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | ā | Every 3 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod ā better | iPhone |
| Requires iOS | 15.0 ā better | 26.0 |
| Further details ā not scored | ||
| Size | 87 MB | 65 MB |
| Age rating | 12+ | 4+ |
| Developer | Curious Labs | G.G. van der Steen |
In-app purchases
StereoPix
- Remove Watermark$9.99
MPO Viewer
- MPO Viewer Pro$4.99








