Comparison

Slidezilla vs Syn

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Slidezilla

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
Read full description

You and your photos and videos deserve to tell a story with transitions, filters, music, and FUN. Slidezilla is the new generation app for your photos and videos that brings them to life and allows you to share your unique slideshow stories instantly. Customize your personal stories with over a hundred FREE filters and transitions, music (yours or ours), colorful backgrounds, and much more! Go to town yourself or tap the Randomize button to automatically generate an awesome slideshow. Create amazing animated slideshows seamlessly with Slidezilla’s user-friendly app. Edit together videos as well as photos to make your creation. Instantly share your creation to your social sites and have others watch your own story. Download Slidezilla NOW to enjoy hundreds of options and customize your own photo slideshow. You have the story—Slidezilla helps tell it.

About

Syn

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
Read full description

Syn-FX is a powerful mobile video editor built for cinematic visual effects, creative storytelling, and expressive editing on your phone. Create music videos, short films, and movies with tools for multi-track editing, background removal, shape masks, audio, text, transitions, slow motion, and layered effects. Whether you’re making short-form content or building something more cinematic, Syn-FX helps you turn everyday footage into something bold and memorable. Whether you’re a content creator, filmmaker, or visual storyteller, Syn-FX gives you the creative tools to edit with more freedom and style. Features Multi-Track Video Editing Edit videos using a flexible timeline editor. • Layer video clips, audio, text, effects, and transitions • Arrange clips freely on a multi-track timeline • Duplicate, rotate, reverse, and zoom clips Cinematic Visual Effects Transform your videos with a growing library of creative effects. Includes: • Neon • Glitch • VHS • Blur • Anime Stack multiple effects to create unique visual styles. Background Removal & Shape Masks • Remove backgrounds from clips • Place videos inside subjects • Combine masks with effects, text, and video layers Advanced Animation Tools • Keyframe animation • Effect parameter curves • Add transitions between clips • 100+ Transitions Slow Motion & Speed Control Add dynamic pacing to your edits. • Optical Flow slow motion • Speed Ramps • Video Speed Editor Audio Tracks & Sound Editing Shape the sound of your videos directly inside Syn-FX. • Add audio tracks and clips to your timeline • Sync sound with video edits GIF Maker • Turn your videos into shareable GIFs in just a few taps. • Turn epic moments into short looping clips Live Camera Effects Record videos with effects applied in real time. • Apply effects at up to 60 FPS • Switch camera lenses • Built-in stabilization Built-In Tutorial Learn how to edit videos. • Learn effects, editing tools, and workflow basics • Designed for beginners and creators who want to improve • Start editing quickly with confidence Frequently Asked Questions Who is Syn-FX for? Syn-FX is designed for: • Filmmakers • Content creators • TikTok and Instagram creators • Video editors • Visual storytellers • Anyone looking for a mobile video editor for expressing their ideas What is Syn-FX? Syn-FX is a mobile video editor focused on cinematic visual effects, creative editing tools, and multi-track timeline editing. Does Syn-FX support video transitions? Yes. You can add transitions between clips to create smooth and cinematic edits. Is Syn-FX beginner friendly? Yes. Syn-FX includes a built-in tutorial and intuitive tools, making it easy to get started. What makes Syn-FX different? Syn-FX focuses on cinematic visual effects and creative mobile editing, giving you powerful tools to build expressive videos wherever inspiration strikes. Hollywood is no longer a distant concept. It’s right here in your pocket. Try Syn-FX now and explode your creativity to the next level. We can’t wait to see what you create. ----- Syn-FX Pro (Auto-Renewable Subscription) Subscribe to Syn-FX Pro to unlock premium effects, tools, and a stream of ongoing improvements. • Subscription options are available monthly or annually • Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period • Your account will be charged within 24 hours before the end of the current period if auto-renew is enabled • You can manage your subscription and turn off auto-renew in your account settings after purchase Terms of Use: https://www.syn-fx.com/app-terms Privacy Policy: https://www.syn-fx.com/app-privacy Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ----- Thank you for supporting Syn-FX. If you have questions, comments, feedback, suggestions, or just want to say hello, reach out at: support@syn-fx.com Instagram: https://www.instagram.com/synfxapp

Screenshots

Slidezilla4 screens
Syn4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Slidezilla versus Syn: the parameters behind the verdict, then further details
ParameterSlidezillaSyn
PriceFreeFree
Rating4.1 (247 ratings)4.8 (48 ratings) — better
Positive reviews63.6% of reviews83.3% of reviews — better
Number of ratings247 — better48
Update frequencyEvery 6 weeksEvery 5 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size31 MB56 MB
Age rating4+12+
DeveloperFalstad.comSYN-FX LP

Customer experience

Slidezilla

All ratings247 ratings
Positive75.7%
Neutral9.3%
Negative15.0%
Written reviews107 reviews
Positive63.6%
Neutral15.9%
Negative20.6%

Syn

All ratings48 ratings
Positive93.8%
Neutral2.1%
Negative4.2%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Bugs and requests

Slidezilla

Reported bugs

15 issues
  • 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
Show 10 more
  • Glitchy video editing experience
  • App crashes when adding videos
  • Photos deleted after slideshow creation
  • Cannot post/save videos
  • App crashes after upgrade to pro
  • Videos speed up unexpectedly
  • Photos not displaying in final video
  • App crashes before saving
  • Redownload requires repayment despite same Apple ID
  • App won't load all available photos

Requested features

15 requests
  • 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
Show 10 more
  • Video trimming and splitting tools
  • Disable Ken Burns zoom effect
  • Custom transition placement
  • Drag-and-drop media reordering
  • Photo background selection
  • Rearrange media by modification date
  • Shorter photo duration options (less than 1 second)
  • Remove unwanted color filters
  • Expanded music library with popular artists
  • Better tutorial for transition controls

Syn

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Slidezilla

One-time1
  • Pro Upgrade$1.99
4 purchases

Syn

Subscriptions4
  • Syn-FX Pro - Monthly$8.001 Month
  • Syn-FX Pro Half-Yearly$36.006 Months
  • Syn-FX Pro - Yearly$47.001 Year
Show 1 more
  • Syn-FX Pro - Yearly1 Year trial$47.001 Year

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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