Frequently asked questions

SeamDiff is $9.99 as a one-time purchase on the Mac App Store. No subscription, no recurring fees, no hidden costs.

Not at the moment. The Mac App Store doesn't support time-limited trials for paid apps. SeamDiff is $9.99 once — if you're not happy with it, Apple's standard refund policy applies.

Yes. A single App Store purchase covers all your personal Macs signed in with the same Apple ID — that's standard Mac App Store licensing.

SeamDiff requires macOS 13 Ventura or later. It works on macOS 13, 14 Sonoma, and 15 Sequoia.

Yes. SeamDiff is a universal binary — it runs natively on both Apple Silicon (M1, M2, M3, M4) and Intel Macs with no Rosetta translation.

Any plain text file. Syntax highlighting works for all major languages — JavaScript, TypeScript, Python, Swift, Go, Rust, Ruby, PHP, JSON, YAML, Markdown, HTML, CSS, and many more — powered by the Monaco editor.

Binary files (images, executables, etc.) are not supported.

Not yet — folder diff is on the roadmap and coming in a future update. Right now SeamDiff focuses on comparing two individual files.

Not yet — Git integration is planned for a future version. For now, open files manually from within SeamDiff.

No. SeamDiff is completely offline. Your files never leave your Mac — all diffing happens locally. See our Privacy Policy for full details.

Yes. SeamDiff runs in the macOS App Sandbox and is distributed exclusively through the Mac App Store. It only accesses files you explicitly open via the file picker.