Free Mac slideshow app · by CodeByZ
MemoryString
MemoryString turns a folder of photos and videos into a cinematic movie on your Mac. Minutes, not an evening in iMovie.
Free. macOS 14 (Sonoma) or later, Apple Silicon and Intel.
Watch a demo
A walkthrough of the app, plus a finished “Memories” slideshow as an example of what you can export.
How to use MemoryString
Slideshow export example
Where it stands
MemoryString is grown up now — it's free, it's fast, and it's used to make real slideshows every week. A few small bugs still turn up, and they get fixed. Get it on the Mac App Store. Feedback welcome.
Build cinematic slideshows on your Mac
MemoryString is a Mac app for turning your photos and videos into polished slideshows — with music, titles, effects, and a timeline that stays out of your way.
Everything runs on-device with your local media. No subscriptions. No cloud lock-in. Completely free to use.
Highlights
The essentials for cinematic photo and video slideshows — without the bloat.
- Import photos, videos, folders, and music
- Timeline editing with trim, mute, titles, and effects
- Deck-of-cards sequences and cinematic looks
- Music playlist plus a built-in royalty-free library
- Export to MP4 — all on-device with your local media
Free. No BS.
MemoryString is completely free to use. If something sucks, tell me. If you have an idea, tell me. Bugs, suggestions, wild requests — all welcome at zacky@codebyz.com.
Get it
Version 1.0.2 · ~184M
Free. macOS 14 (Sonoma) or later, Apple Silicon and Intel.
Coming next
Honest roadmap. No vaporware.
Polish & bug fixes
Small bugs still turn up. They get fixed fast, and the rough edges keep getting smoother.
Windows — unlikely
No Windows version planned. The Mac app is where the focus stays.
Quick answers
- What is it?
- A free Mac slideshow app. MemoryString turns a folder of photos and videos into a cinematic movie — music, titles, effects, MP4 export.
- Music rights
- Use music you have rights to, or pick from the built-in royalty-free library.
- Privacy
- Your media stays on your Mac. Editing and export run locally. Privacy policy
- New name
- MemoryString was previously released as MemoryFlow. Same app, same free license — better name.
- Feedback
- Email zacky@codebyz.com with bugs, ideas, or anything else.
Created by Zacky Pickholz · © 2026 All rights reserved
Proprietary product of Zacky Pickholz. codebyz.com
App Store not an option? Mac installer