# Slidezilla vs Syn

The clearest difference is rating: Syn at 4.8 against Slidezilla's 4.1. Syn also leads on update cadence (every 5 days vs every 6 weeks) and review sentiment (83% vs 64%). Slidezilla's advantage is ratings volume (247 vs 48). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Slidezilla sells 1 one-off in-app purchase and Syn sells 4 in-app purchases, starting at $8.00 per month. Whichever you choose, the download price is not the number that matters.

Syn holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Slidezilla has 247 ratings behind it against 48, so its average is the more settled of the two. Written reviews point the same way: 64% of Slidezilla's written reviews are positive against 83% of Syn's.

Slidezilla ships an update every 6 weeks, Syn every 5 days. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Slidezilla | Syn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (247 ratings)](https://appshunter.io/ios/app/slidezilla/id897567882/reviews) | **[4.8 (48 ratings)](https://appshunter.io/ios/app/syn-fx-video-editor-and-effects/id6737611531/reviews)** |
| Number of ratings | **247** | 48 |
| Positive reviews | 63.6% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 56 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Falstad.com](https://appshunter.io/developer/453338632) | [SYN-FX LP](https://appshunter.io/developer/1777238079) |

## What reviewers say

### Slidezilla

[App page](https://appshunter.io/ios/app/slidezilla/id897567882)

Transform your photos and videos into engaging slideshow stories with a wide array of filters, transitions, and music. Easily create and share custom animated presentations or let the app randomize for quick, impressive results.

**Highlights:** Photo and video editing, Customizable slideshows, Hundreds of filters and transitions, Add music (yours or app's), Colorful backgrounds, Randomize slideshow generator, Instant social sharing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $1.99 | one-time |

**What reviewers like**

- ✨ Easy to use and intuitive interface
- 🎬 High-quality transitions available
- 💰 Most features free without paywall
- ⚡ Quick slideshow creation
- 🎨 Good variety of filters and effects

**What reviewers complain about**

- 🐛 Frequent app crashes
- 📸 Photos/videos not loading from camera roll
- 💧 Watermark too prominent
- 🔒 Limited free photo limit (10 photos max)
- 🎬 Cannot control transition placement

**Reported bugs**

- App crashes when creating videos
- Photos and videos not appearing in selection screen
- Camera roll shows incorrect photo count
- App freezes on 'Get Started' button
- Videos appear squished and distorted

**Requested features**

- Add text overlay capability
- Import custom music from camera roll
- More transition options
- Remove or reduce watermark
- Ability to use more than 10 photos without upgrade


### Syn

[App page](https://appshunter.io/ios/app/syn-fx-video-editor-and-effects/id6737611531)

Create stunning videos with a wide range of effects, filters, and editing tools. Easily split, cut, speed up, or slow down clips, and apply over 150 trending effects in real-time or during editing. Animate parameters and blend multiple effects for unique visual creations.

**Highlights:** Over 150 trending effects (Neon, Glitch, VHS, Anime), Stack and blend multiple effects, Real-time live camera effects, Speed up/slow down with Optical Flow, Animate effect parameters with keyframes, Split, cut, and edit video clips, Snapshot frames from videos

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Syn-FX Pro - Monthly | $8.00 | per month |
| Syn-FX Pro Half-Yearly | $36.00 | per 6 months |
| Syn-FX Pro - Yearly | $47.00 | per year |
| Syn-FX Pro - Yearly | $47.00 | per year |


## Frequently asked questions

### Is Slidezilla free?

Slidezilla is free to download, with in-app purchases available.

### Is Syn free?

Syn is free to download, with in-app purchases available.

### Which has better reviews, Slidezilla or Syn?

Syn is rated higher. Slidezilla averages 4.1 out of 5 from 247 ratings, while Syn averages 4.8 from 48 ratings.

### Do Slidezilla or Syn have ads?

Both Slidezilla and Syn show ads.

### Which is updated more often, Slidezilla or Syn?

Slidezilla ships an update every 6 weeks, and Syn every 5 days. Most recently, Slidezilla was updated on September 17, 2026 and Syn on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*