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Viscosity vs VPN Tracker 365: catalog facts
Viscosity	VPN Tracker 365
Paid One-time purchase of $16 after a 30-day free trial, no subscription.	Paid Paid subscription with a free trial.
Windows, macOS	macOS, iOS
Native interface on both macOS and Windows Fine-grained DNS and routing control	Supports more than ten VPN protocols Works with over 300 gateway models
Paid after the trial OpenVPN only, no WireGuard	Apple platforms only Subscription required after the trial
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.