Seed by soil, not by season. Grass seeding and pre-emergent windows open when your soil says so, not when the calendar does.
Stop guessing. Plant by soil.
SoilIQ™ tells you when to seed, plant, water, mow, protect, or wait, using the two numbers that actually decide what happens in your ground.
Air temperature tells you how the day feels. Soil temperature and soil moisture decide whether seed germinates, whether roots grow, whether a pre-emergent barrier holds, and whether today's watering helps or hurts. SoilIQ helps you look below the surface.
KNOW MY LAWN
Build your Lawn Profile with grass type, sun exposure, irrigation, soil type, drainage, foot traffic, current condition, and a custom lawn name.
Today's Lawn Read combines your Lawn Profile with soil data and forecast trends into one prioritized recommendation on the Today tab. Tap it to see why it triggered and what to do next.
SOIL AWARE WATERING
The same moisture reading means opposite things in sand and in clay. SoilIQ measures root zone moisture against your own soil's wilting point and field capacity, so dry means dry for your ground.
Forecast rain is weighed against evapotranspiration and weighted by probability, so a light chance is not banked as a soaking. When the root zone is holding all it can, SoilIQ tells you to wait.
SOILIQ CALCULATOR
Plan what to buy. Measure what to apply.
- Product Rate Calculator
- Nitrogen Calculator
- Grass Seed Calculator
- Mulch, Soil & Sand Calculator
Save calculations to your Journal, share image cards, or log results as lawn activity.
LAWNIQ
LawnIQ™ is a soil-powered lawn advisor built into SoilIQ. It turns soil temperature, soil moisture, forecast trends, your lawn profile, and recent activity into clear guidance.
Use LawnIQ to understand:
- When to mow
- When to water, and when to wait
- When to seed or overseed
- When heat stress may become a concern
- When rain may change your plan
- When pre-emergent timing windows may be approaching
LAWN ACTIVITY & FIELD JOURNAL
Log mowing, watering, overseeding, fertilizing, aerating, pre-emergent, rain, field notes, photos, and seasonal observations.
SOIL TEMPERATURE AT MULTIPLE DEPTHS
Readings at 2, 6 and 21 inches, calculated to exactly those depths. Seeds germinate near the surface. Roots live below.
14-DAY SOIL FORECASTS
Soil temperature trends for seeding, planting, watering, and frost protection.
HISTORICAL GDD TRACKING
Tracked crop Growing Degree Days calculate from the actual planting date using historical weather data, not just the forecast window.
PLANTAI FOR 160+ CROPS
PlantAI™ helps you understand crop-specific planting readiness using soil temperature, forecast conditions, frost risk, moisture, and timing windows.
Crops started from seed get a soil temperature verdict. For the rest, SoilIQ says so plainly rather than inventing an answer.
SAVED LOCATIONS & PROBE CALIBRATION
Track conditions across your lawn, garden, plot, farm field, or client site. Calibrate readings against your own soil probe, per location and depth.
APPLE WATCH, SIRI, WIDGETS & LIVE ACTIVITIES
Check soil temperature from your wrist, ask Siri without opening the app, and pin readings to your Home Screen, Lock Screen, and Live Activities.
PRIVACY-FIRST
No account required. Your location is used only to fetch soil and weather data. SoilIQ does not sell your data, and core features work offline from cached readings. Export your full history at any time, because your records are yours.
SOILIQ PRO
Upgrade to unlock:
- SoilIQ Calculator
- LawnIQ lawn guidance
- Lawn Profile and Today's Lawn Read
- PlantAI guidance for 160+ crops
- 14-day soil forecasts
- Historical GDD tracking
- Soil aware watering guidance
- Field Journal and Lawn Activity tracking
- Saved locations and probe calibration
- Smart alerts and reminders
- Apple Watch soil and LawnIQ insights
Feedback: hello@soiliq.app
SUBSCRIPTION TERMS
Free features stay free forever. SoilIQ Pro auto-renews monthly or annually and can be canceled anytime in Apple ID settings.
LEGAL
Terms: https://www.soiliq.app/terms
Privacy: https://www.soiliq.app/privacy
I recently downloaded SoilQ and overall I’ve been really impressed with how simple and informative the app is. The main value is that it helps you understand what’s actually happening in your soil rather than just guessing what your plants might need. 🌱The interface is clean and easy to navigate. After entering basic information about your plants or soil conditions, the app gives clear recommendations on nutrients, moisture levels, and general plant health. I especially like that the information is explained in a way that’s easy to understand even if you’re not experienced with soil science.Another strong point is how actionable the advice is. Instead of just giving raw data, SoilQ translates it into practical steps—like what nutrients may be missing, watering adjustments, or soil improvements you can make.Overall: SoilQ is a well-designed, helpful tool for gardeners, plant owners, or anyone interested in improving soil health. It makes technical information accessible and turns it into practical advice you can actually use. 🌿
Developer Response
Thank you. This is a great review. If you have any questions about the app, please feel free to email me at hello@soiliq.app!
Perfect timing for planting
Turf’s up
SoilIQ has been a game changer for my lawn this season. It took the guesswork out of timing and showed me exactly when soil conditions were right to seed, which made a noticeable difference in how quickly and evenly my grass came in. I also used it to plan planting around optimal root growth conditions, and everything established much stronger than in past years. Simple, accurate, and actually useful—highly recommend for anyone serious about their lawn and garden.
Developer Response
Thank you for your review! Glad SoilIQ helped with the seeding timing. v2.0 just shipped if you want to check it out, now with Apple Watch and iPad functionality!
What I’ve Been Missing
Travis - Budget Lawns
I can’t stand keeping up with everything for my lawn and garden in different places. Eventually, I just give up. From the soil temp to the major tasks like fertilizing, watering, and pre-emergent, I can now track and log information that matters in one location for right when I need it. It’s too easy not to. SoilIQ is worth it!
A serious app for lawn care
thelawnguy17
SoilIQ feels like a real tool, not just another basic weather app. The soil temperature data, forecasts, LawnIQ guidance, and journal features make it useful for planning lawn work and tracking what I’ve done. It’s detailed enough for someone who cares about lawn care but still simple enough to use quickly. 5-stars!
SoilIQ 2.5.1: Accuracy and Reliability
This release is about being right. Every change below either corrects something the app was telling you, or makes sure that what you saved stays saved.
What's new:
- Honest answers in PlantAI: crops that are not started from seed no longer show a planting readiness verdict that never applied to them. Where soil temperature is not the deciding factor, SoilIQ says so
- Right depth, right crop: planting readiness is judged at the depth that matters for each crop, not the depth you happen to be viewing. A shallow-sown crop and a deep-sown crop no longer share a verdict
- Your Data now lives in Settings under About, where you would look for it
- Data export includes your saved calculations, and the export summary describes exactly what is in the file
Fixes and improvements:
- Fixed a crash that could occur when opening a saved calculation
- Lawn Profile changes now save reliably. A change could previously be reported as saved without being written
- Soil texture is read fresh for each location instead of carrying over from the last place you viewed, which affected watering and moisture guidance
- What's New shows the notes for the version you just installed, and no longer appears the first time you open the app
- Reliability improvements to how your information is loaded and saved
Stop Guessing. Plant by Soil.
Version 2.5.1
The developer, Teddy Mutterperl, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
VoiceOver
Larger Text
Dark Interface
Reduced Motion
Information
Seller
Teddy Mutterperl
Size
21.3 MB
Category
Weather
Compatibility
Requires iOS 17.6 or later.
iPhone Requires iOS 17.6 or later.
iPad Requires iPadOS 17.6 or later.
Mac Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.