I've been using Gaia GPS for years and recommend it to anyone who asks. Basic membership is free, premium is $39.99/year which is $3.33/month and well worth it IMO. Avalanche expert Bruce Tremper uses it for real time info in the backcountry where map layers help in deciding which slopes to avoid skiing due to current avy danger. I live in the Tahoe basin where there are plenty of trails that are poorly or not signed, and I can't tell you how many times Gaia has saved my butt (especially when the trails are covered in snow).