DuoBolt
v2.3Find duplicate files and similar photos.
A fast desktop tool for analysing, comparing and cleaning large file collections — and now, with Sync Folders, for keeping two of them in line.
- Duplicates
- Similars
- Sync Folders · new
- AI Curation
Independent tools for macOS, Windows, and iOS — engineered for focus, privacy, and long-term reliability.
No tracking · No bloat · No noise
Products
Find duplicate files and similar photos.
A fast desktop tool for analysing, comparing and cleaning large file collections — and now, with Sync Folders, for keeping two of them in line.
Clean, reliable scanning and code creation.
A precise QR and barcode scanner and a dependable code generator for iPhone and iPad — with iCloud sync, and without ads, clutter or tracking.
See what your drive really holds.
A free Mac app that shows how much of an APFS drive is stored once as clones, where those clones live, and what a local snapshot is holding back. It reads file metadata only and changes nothing.
Audio
Monolith DSP makes small, precise tools for listening and mixing, for iPhone and iPad.
Stereo and phase analyzer for iPhone and iPad, as an AUv3 or on its own. Free, no data collected.
Mid/side encoder, decoder and stereo width control for iPhone and iPad, as an AUv3 or on its own. Free, no data collected.
Principles
No servers, telemetry or external dependencies. When a feature needs a connection, it is explicit, minimal and under your control.
No analytics, no tracking, no profiling. Sync, where offered, is user-owned and encrypted, such as iCloud.
Rust, C++, Swift and native development where it matters — fast, predictable, no unnecessary layers.
Clear architectures, minimal dependencies, and no reliance on fragile third-party infrastructure.
Track record
Stereo imaging and phase analysis, used by producers and students to understand stereo width, phase and balance.
Vectorscope 2, free on iPhone and iPad →A mid/side utility that encoded, decoded and processed M/S signals for precise control of the stereo image and gain staging.
M/S Processor 2, free on iPhone and iPad →Custom mouse and trackpad acceleration, giving power users smoother, more controllable pointer motion across profiles.