Compare software

Savvy Navvy vs qtVlm: catalog facts
Savvy Navvy	qtVlm
Screenshots	Screenshots
Best for: Leisure sailors and motorboaters who want simple route planning on a phone	Best for: Cruising and racing sailors who plan routes around weather
Free + paid options Free to download; full features require a paid subscription.	Free + paid options The GRIB viewer is free; mobile and tablet apps, chart packs and the GRIB service are paid.
Android, iOS	Windows, Android, iOS
Route planning that accounts for wind, tide and current Charts, tides and weather in one app Simple interface for less experienced boaters	Weather routing with departure-time comparison Reads S57, S63, raster and MBTiles charts AIS and NMEA instrument support Iridium GO certified
Not a replacement for certified onboard navigation equipment Advanced features require a subscription	Mobile versions and chart packs are paid Wide feature set takes time to learn
Downloadable app	Downloadable app
Not open source	Not open source
License not stated	License not stated
Not stated if an account is 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 Sources for Savvy Navvy savvy-navvy.com Catalog checked September 23, 2026	Official website Full listing and sources Sources for qtVlm meltemus.com apps.apple.com/us/app/qtvlm/id999110023 Catalog checked September 24, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.

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