MultiPhoto2 vs TrailStack
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
MultiPhoto2
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Do you know about multiple exposure in photography? This is a technique that exposes a single photograph by releasing the shutter many times. MultiPhoto is software that realizes multiple exposure with the iPhone camera. Usage is simple. 1. Take a base photo. 2. I will make multiple exposures on the base photo. 3. Save the photo created by multiple exposure. β Base photo shoot β Press the camera+ mark on the right corner of the menu. When you take a base photo, it will be displayed in halftone. (It can be used as a reference for alignment when performing multiple exposures.) β Add multiple exposure photos β Press the camera+ mark on the right corner of the menu. β Saving photos β Press the second folder mark from the left of the menu. Photos are saved to your camera roll. β Deleting an image currently being created β If you press the third trash can mark from the left of the menu, the data currently being shot will be deleted. β Checking the image currently being created β You can check the data currently being captured by pressing the second eye mark from the right of the menu. β Image composition mode switching β The button in the left corner toggles the blending mode. B&W synthesizes the bright parts of the captured image. For the three light colors, 90% of the bright areas are combined. For the three skelton colors, 70% of the bright part is synthesized. The three colors of the color background synthesize an image with changes. Keep your smartphone stationary. In the compositing process, brighter parts are added to the photo. Challenge yourself to take some fun pictures.
TrailStack
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Turn any video into a stunning strobe photo β right on your iPhone device. TrailStack stacks multiple frames from your video into one composite image, creating the classic strobe effect used by sports photographers, coaches, and creative artists. No cloud upload. No subscription. No Photoshop skills required. HOW IT WORKS 1. Pick any video from your camera roll 2. Adjust Trim, Interval, Sensitivity, Fade, and Cleanup sliders 3. See results instantly in the real-time preview 4. Export a crisp PNG at your video's original resolution to your Photos KEY FEATURES β’ Import any existing video β no in-app recording required β’ Real-time preview as you adjust every parameter β’ 4 built-in presets: Default, Sport, Art, Sharp β’ Supports slow-motion video for ultra-detailed motion analysis β’ Export at original video resolution PNG (up to 1920px on the longest side) β’ 100% on-device processing β your videos never leave your phone β’ Free to use, with an optional ad to remove the watermark from exports PERFECT FOR β’ Athletes & coaches β analyze a golf swing, tennis serve, or gymnastics routine β’ Skateboarders & BMX riders β capture trick sequences in one frame β’ Dancers & performers β visualize choreography and movement flow β’ Physics & science teachers β demonstrate motion and velocity visually β’ Social media creators β create eye-catching composite sports photos WHY TRAILSTACK? Other strobe photo apps require you to record video inside the app β TrailStack works with footage you already have. Sony MotionShot was discontinued in 2021. Clipstro is iOS-only and cannot import existing videos. Photoshop can achieve similar results, but takes 30β60 minutes of manual work per photo. TrailStack does it in seconds. PRIVACY FIRST All processing happens entirely on your device. We never upload, store, or transmit your photos or videos to any server. What's on your phone stays on your phone. FREE & FAIR TrailStack is free to download and use. Exports include a small watermark. Watch a short optional ad to save a watermark-free version at any time β no subscription, no hidden fees. Download TrailStack and see your movement in a whole new way.
Screenshots
Verdict
The clearest difference is ads: MultiPhoto2 at none against TrailStack's shown. TrailStack's advantage is update cadence (daily vs every 5 days) and iOS requirement (13.0 vs 15.5). On price, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MultiPhoto2 ships an update every 5 days, TrailStack daily. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.
| Parameter | MultiPhoto2 | TrailStack |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Daily β better |
| Ads | No β better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 13.0 β better |
| Further details β not scored | ||
| Size | 2 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Atsushi Yamada | Hitoshi Tamura |
In-app purchases
MultiPhoto2
No in-app purchases
TrailStack
No in-app purchases









