Slo vs Replay15
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Slo
Easily create slow-motion videos and fun photo strips. Save and share your creations directly to social media or your camera roll. Offers a free version with a watermark and an in-app purchase to remove it.
- Create slow-motion videos
- Make fun photo strips
- Save videos to camera roll
- Share to Facebook and Instagram
- Watermark removal via in-app purchase
Read full descriptionHide full description
Use Slo-mo Booth to film your own slow motion videos and create fun photo strips. Slo-mo Booth makes it easy to save your videos to your camera roll and share on Facebook or Instagram right from the app. With a 5s or above, Slo-mo Booth shoots at a high frame rate, but plays back at the normal frame rate for great slow motion videos. For phones that don’t support high frame rate recording, Slo-mo Booth shoots at the normal frame rate and plays back at a slower frame rate to create slow motion GIF-like videos. Also just like a normal photo booth, you can create fun photo strips by using the photo feature to take four photos and save them into a classic photo strip. You can easily save them to your camera roll or share on Facebook or Instagram right from the app. The free version of Slo-mo Booth inserts a watermark on the video. Through an in-app purchase you can remove the watermark.
Replay15
This app acts as a continuous loop recorder, saving the last 15 seconds of video in slow motion. It's designed for capturing and instantly reviewing fast-paced action, allowing users to adjust playback speed for detailed analysis.
- Continuous loop recording
- Instant slow-motion save
- Adjustable slo-mo speed (30-240fps)
- One-button operation
- MP4 export
- Real-time buffering
Read full descriptionHide full description
Replay15 Turn your phone into a personal slow-motion replay system. Requires phone with slow-motion video recording. How it works: Continuously records in loop, keeping last 15 seconds in memory. Tap Save to instantly save as slow-motion MP4 and open in video player. Simple & powerful: One-button control, no setup needed Starts buffering immediately Always ready to capture action Adjust slo-mo speed: 30fps (normal) to 240fps (8x slower) Perfect for: Sports: Review goals, fouls, calls like VAR system Racing: Capture photo-finish moments Martial arts: Relive knockouts, check punches Extreme sports: Instant replay without missing details Replay 15 - Save and review moments that matter.
Screenshots
Verdict
The clearest difference is in-app purchases: Replay15 at none against Slo's 1. Replay15 also leads on update cadence (monthly vs every 2 months). Slo's advantage is ads (none vs shown) and iOS requirement (7.1 vs 15.6). On price, rating, ratings volume 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. Slo sells 1 one-off in-app purchase. Replay15 asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 1.0 for Slo against 1.0 for Replay15. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Slo ships an update every 2 months, Replay15 monthly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | Slo | Replay15 |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) | 1.0 (1 ratings) |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Rien Heald | IURII VOEVODIN |
In-app purchases
Slo
- Slo-mo Booth Premium$1.99
Replay15
No in-app purchases









