29/04/2026
5 Free Tools That Work on Everything — Windows, Mac, Linux, iPhone, and Android
One of the most annoying things in tech is finding a great app — only to discover it doesn't work on your other devices.
The good news? In 2026, you don't have to pick sides. These 5 tools work flawlessly on Windows, macOS, Linux, iOS, and Android. No lock-in, no "sorry, Mac only." Just stuff that works.
1. Bitwarden — Stop reusing passwords. Bitwarden is a free, open-source password manager that syncs across everything. Phone, laptop, even your partner's computer if you share a family account. Costs £0/year for the basics.
2. Obsidian — Notes that stay yours. Unlike Notion or Evernote, Obsidian runs on local files. Your notes are plain Markdown on your hard drive — you can take them anywhere, even if you switch apps. Works identically on every OS.
3. Signal — Private messaging that doesn't suck. Yes, it's encrypted. But also: it works. High quality video calls, fast sync between devices, no ads. Signal runs on everything and won't sell your data to train AI.
4. ProtonVPN — Your privacy on public Wi-Fi. Especially useful in the Highlands where you might be hopping between cafés, B&Bs, or tourist centres. ProtonVPN has a generous free tier and runs on all platforms.
5. KDE Connect — Link your phone and PC without cables. Copy from phone, paste on laptop. Get your phone notifications on your desktop. Control your PC's music from your phone. Works between Android + any desktop OS (Windows/Mac/Linux). iPhone support is limited but the desktop side is fully cross-platform.
The common thread: they're all open-source or privacy-first, they all sync across devices, and you can use them today for free.
Which cross-platform tool do you rely on most?