RainDrop: Virtual Rain Gauge
Weather · RainDropGauge
RainDrop: Virtual Rain Gauge screenshots
If your day depends on how much rain has landed on a specific patch of ground, RainDrop is built for you. Gardeners deciding whether to water, growers checking a field, site managers watching a drainage basin and trail users weighing a muddy ride all fall into its audience. What the app gives them is a running rainfall total for chosen places in the United States, rather than a general forecast for a whole region.
That distinction matters. A weather forecast tells you what might come; a rain gauge tells you what already fell, and the two answer different questions. RainDrop sits on the measurement side, pulling rainfall amounts for locations you pick and letting you look back at how those totals built up over hours and days.
It is free to install, carries no advertising, and offers in-app purchases for premium features. The developer describes it as the best app for precise US rainfall totals, a claim worth treating as marketing rather than a specification. With more than 100,000 installs and a 4.2 average from 2,274 ratings, it has enough of an audience to suggest the basics work for people.
What the rainfall readings actually cover
The core of the app is real-time rainfall amounts for a location. You choose where you care about, and the app reports how much rain has fallen there. Past totals are available by day and by hour, which is the part I would lean on most: an hourly breakdown shows whether a storm dumped everything in forty minutes or spread it thinly across an afternoon.
The developer also includes a 16-day rainfall forecast. That stretches the tool beyond record-keeping into planning, and it pairs naturally with the comparison feature, which sets current rainfall against average levels for the same place. Seeing that a month is already running well above or below normal is often more useful than the raw number on its own.
Heat maps visualize rainfall patterns, which suits anyone thinking in terms of areas rather than points: a farm with several fields, a watershed, a county. The developer lists agriculture, construction, stormwater drainage, forestry and environmental monitoring among the intended uses, and the heat map view is the piece that makes those broader readings plausible.
The smaller tools around the totals
Two features stand out as genuinely practical additions. The first is a muddy ground estimate, which uses rainfall data to judge how saturated the ground is likely to be. For anyone planning to drive equipment across a field, walk a trail or set up for an outdoor event, that is a more actionable reading than inches of rain alone.
The second is location tracking for more than one place. You can follow several locations rather than being tied to wherever you happen to be standing, which is the difference between a personal rain gauge and a monitoring tool. Rainfall totals can also be shared, so a reading can go straight to a colleague, a client or a group rather than being retyped.
The developer provides in-app chat support, meaning questions go directly to the people who build the app. That sounds like a small thing, but it is useful for an app whose numbers people may need to trust for work decisions.
Recent updates have tidied up some rough edges. In the US, the app now shows a raining indicator when the latest radar detects rain at your location. You can rename the area shown under Your Location, and that location stays fixed between refreshes so totals do not shift. The alerts are now visible instead of being covered by the navigation buttons, and each day in the six-month forecast calendar is filled in.
What it asks of you
RainDrop is free to download and shows no ads, which is unusual for a weather utility of this type. It does offer in-app purchases, and the developer describes the app as free with premium features that add capabilities and allow you to track more locations. If you only need one or two places, the free side of the app may be all you touch; if your work involves following many sites at once, expect the premium tier to be the relevant one.
The other requirement is geographic. The app is built around rainfall totals across the United States, so its readings are for US locations. That is the scope the developer sets, and it shapes who the app is useful to.
There is no advertising to sit through and no obvious barrier to trying it. The practical cost question is simply whether the number of locations you want to follow pushes you into the paid features.
Getting useful readings out of it
A label like "north field" or "home garden" is easier to scan at a glance than a set of coordinates, especially if you are checking several locations in a row.
From there, the hourly history is where the real insight lives. A daily total tells you a storm passed through; the hourly view tells you when it arrived, how hard it fell and whether the ground had time to absorb it. If you are making a decision about irrigation, spraying, pouring concrete or opening a trail, that timing is often the deciding factor.
The 16-day forecast is best used alongside the average comparison rather than on its own. A forecast of more rain means little if you do not know whether the ground is already saturated, and the muddy ground estimate is there to bridge that gap. Checking the two together gives a fuller picture than either does alone.
Finally, the sharing option is worth remembering if your readings feed into someone else's decision. Sending the actual total is quicker and less error-prone than describing it, and it keeps a record of what the app reported at that moment.
A rain gauge for people who need the numbers
RainDrop does one job and does it in a way that suits people whose plans hinge on measured rainfall rather than a general outlook. The combination of real-time totals, hourly and daily history, a 16-day forecast, average comparisons and heat maps covers the questions a grower, site manager or trail user is likely to ask. The muddy ground estimate and multi-location tracking push it further toward being a working tool than a curiosity.
The caveats are straightforward. It is a US-focused app, so its value depends on your locations being there. And the developer's claim to be the best at this is a claim, not a guarantee; the 4.2 average from more than 2,000 ratings suggests a capable app rather than a flawless one.
If you garden, farm, build, manage drainage or spend time on trails in the United States and want to know how much rain has actually fallen, this is a sensible install. If you want a general weather forecast or you need readings outside the US, the app's focus will not match what you are after.
The short verdict
A focused, ad-free US rainfall tracker that suits anyone whose plans depend on measured rain rather than forecasts.
What's new in version 3.1.69
• In the US, see "raining" when the latest radar shows rain at your location. • Rename the area shown under Your Location. • Your Location stays put between refreshes, so totals don't jump around. • The alerts list no longer hides behind the navigation buttons. • The 6-month forecast calendar now fills each day. • Other bug fixes and performance upgrades.
App specs
- Version3.1.69
- UpdatedOctober 9, 2026
- Downloads100K+
- RequiresAndroid 7.0+
- PriceFree
- Age ratingEveryone
RainDrop: Virtual Rain Gauge: frequently asked questions
What does RainDrop actually measure?
It reports how much rain has fallen at locations you choose, rather than forecasting what might come. You can see real-time amounts along with past totals broken down by day and by hour, so you can tell how a storm built up over time. It also compares current rainfall against average levels for the same place.
Is RainDrop free to use?
The app is free to download and shows no ads. It does offer in-app purchases, described as free with premium features that add capabilities and allow you to track more locations. Whether you need those depends on how many places you want to follow.
Can I track more than one location at a time?
Yes, tracking multiple locations is one of the app's listed features. Premium features allow you to track more locations, so the number you can follow may depend on whether you use the paid side of the app. Renaming the area under Your Location helps keep places distinguishable.
How does the muddy ground estimate work?
It uses rainfall data to estimate how muddy or saturated the ground is likely to be. That is more useful than a raw total when you are deciding whether to drive equipment across a field, walk a trail or set up for an outdoor event. It works best alongside the average comparison, since ground conditions depend on how much rain has already accumulated.
What has changed in recent updates?
In the US, the app now shows a raining indicator when the latest radar detects rain where you are. Your Location stays fixed between refreshes so totals do not shift, the alerts are now visible instead of being covered by the navigation buttons, and each day in the six-month forecast calendar is filled in. The update also includes general bug fixes and performance upgrades.
Pros
- Real-time rainfall totals for chosen locations
- Hourly and daily history for past rain
- 16-day forecast and average comparisons
- Heat maps and muddy ground estimates
- Free with no advertising
Cons
- Rainfall data covers US locations
- Premium features and extra locations are available
- Focused on rainfall rather than general weather
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