# CodeByZ > CodeByZ builds MemoryString, a free local-first slideshow app for Mac. ## MemoryString - Product page: https://www.codebyz.com/products/memory-string - Mac App Store (free): https://apps.apple.com/us/app/memorystring/id6806579257?mt=12 - Docs index for agents: https://memorystring.codebyz.com/llms.txt - Docs home: https://memorystring.codebyz.com/ - FAQ: https://memorystring.codebyz.com/get-started/faq - Comparison (MemoryString vs FotoMagico vs iMovie): https://memorystring.codebyz.com/get-started/memorystring-vs-fotomagico-vs-imovie - Privacy: https://www.codebyz.com/products/memory-string/privacy ## One-line facts - Free on the Mac App Store. No account, no subscription, no ads. - macOS 14 (Sonoma) or later. Apple Silicon and Intel. - Runs on your Mac. Photos and videos are not uploaded. - Long story short builds a movie from 1 to 30 minutes from a big album or folder. - Fit Show to Music paces the show so your song covers the film, including the end card. - Music Follows Show keeps music aligned with show length. - Keep Best Shots and Auto Trim are on-device helpers. Original files are never rewritten. - Export is H.264 MP4. Every movie ends with a short Created with MemoryString credit. - MemoryString is not a full replacement for FotoMagico (live stage, layers, clicker) or for iMovie as a full video editor. - Press: Six Colors App Report, Philip Michaels, 19 Oct 2026: https://sixcolors.com/post/2026/10/app-report-help-is-on-the-way/ ## Compare page on this site - https://www.codebyz.com/products/memory-string/compare