Most lawns are watered on a timer. Timers don't know it rained.
Lawn Logic is a smart watering app that watches the weather at your address and tells you one thing each morning: water your lawn today, or don't. It tracks how much moisture your soil is actually holding — from rainfall, evaporation, your grass type, and your soil type — and only calls for water when your lawn has genuinely run down.
TRY IT WITHOUT AN ACCOUNT
Tap "Continue as guest" and go straight to your lawn — no email, no password, nothing to sign up for. Add an account later and everything you set up comes with you.
YOUR LAWN AT A GLANCE
One number tells you where you stand. A soil moisture arc, a plain-language answer, and the reasoning behind it. Tap once to see the math: what your lawn needed, what the rain delivered, and what you watered.
IT'S NOT A SCORE
A lower number is often the app working correctly. Letting your soil dry down toward its trigger is what drives roots deeper — so Lawn Logic will tell you to wait, and explain why.
A WATERING SCHEDULE THAT RESPONDS TO RAIN
Every watering schedule built on a timer wastes water. Lawn Logic recalculates daily from local rainfall and evapotranspiration, so your lawn watering schedule follows the weather instead of the calendar.
KNOWS WHEN YOUR GRASS IS DORMANT
When sustained cold puts your lawn into dormancy, Lawn Logic stops recommending water. Dormant grass can't use water, and watering it anyway invites disease.
WEATHER STATIONS AREN'T YOUR BACKYARD
A summer thunderstorm can soak your street and miss the airport. Correct any day's rainfall in two taps — light, steady, heavy, or an exact rain gauge reading — and your soil moisture recalculates instantly. Free for everyone.
BUILT AROUND YOUR LAWN
Grass type, soil type, shade, and mowing day all change the answer. Bermuda grass in sandy soil is a different lawn from fescue in clay, and Lawn Logic treats them differently. Set up separate zones for the front and back yard, each with its own watering answer.
SHARE ONE LAWN WITH YOUR HOUSEHOLD
Invite the people you share a yard with. Everyone sees the same watering answer and the same history, and one subscription covers all of them.
WHAT YOU GET FREE
• The full soil moisture model
• Your daily watering answer
• Evening reminders only when your lawn needs something
• Home screen widget
• 14-day moisture trend
• Rain correction
• Water savings tracking
LAWN LOGIC PRO — $2.99/month or $19.99/year, with a 7-day free trial on the annual plan
• Sage, an AI groundskeeper that reads your live lawn data and answers questions about your lawn, not lawns in general
• Multi-model ensemble forecasts
• Apple WeatherKit as a data source
No ads. No account required to try. Cancel anytime.