Meet RainBook — Rain gauge logbook, offline

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RainBook

Rain gauge logbook, offline

What RainBook does

The rain gauge on the fence post is the most important instrument on the ranch. Grazing rotations, stocking rates, hay buys, and USDA drought-program files all trace back to what actually fell in your pastures — not what a radar pixel guessed from forty miles away. RainBook is the offline logbook for those physical gauges: every gauge you run, every reading you take, kept in one dated record that is ready when the county office asks for it.

Add each gauge once — Headquarters, North Pivot, Creek Crossing — and group them by pasture. On gauge-checking day, logging a reading takes two taps: pick the gauge, dial in the tenths, done. Trace amounts, empty checks, and hail or storm notes are all first-class entries, so the record shows the dry spells as clearly as the wet ones. There is no account, no sync, and no signal required — the far gauge on the back section logs exactly the same as the one by the house.

The payoff comes at decision time. Water-year and calendar-year totals run per gauge and per pasture, side by side with last year and with the normal you set for your place, so you can see a failing season developing in June instead of admitting it in September. When Livestock Forage Disaster Program deadlines or Pasture, Rangeland, Forage insurance decisions come around, RainBook assembles your readings into a dated rainfall record — a clean, chronological document of what your gauges actually caught, built for the folder you hand the Farm Service Agency office, your insurance agent, or your own files. Pasture condition notes with photos ride along as supporting evidence.

Radar apps estimate. Ranch platforms charge every month for a hundred features you do not need. The feed-store calendar fades. RainBook does one job completely: it is the permanent, portable record of your rain — every gauge, every tenth, every year.

• Unlimited physical rain gauges with two-tap readings • Pasture groups that roll gauges up by grazing unit • Water-year and calendar-year totals with year-over-year comparison • Season-versus-normal tracking against the baseline you set • Dated rainfall-record document for FSA, LFP, and PRF files • Pasture condition notes with photos as supporting evidence • CSV backup of every reading • Fully offline — no account, no subscription, no signal needed

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

• Gauge Logbook — Every physical gauge on the place gets its own dated reading history. A two-tap entry flow tuned for gauge-checking day handles tenths, trace amounts, and empty checks, entirely offline.
• Pasture Groups — Group gauges by pasture or grazing unit and see rainfall roll up per pasture, so rotation and stocking calls are made on the water that pasture actually caught.
• Water-Year Analytics — Water-year and calendar-year totals per gauge and per pasture, compared against last year and the normal the producer sets — the failing-season early warning that drives destocking and hay decisions.
• Rainfall Record Export — Assembles any date range into a dated, chronological rainfall record as a PDF plus CSV backup — built for FSA/LFP program files and PRF insurance interval decisions.
• Condition Notes — Dated pasture-condition notes with photos — forage state, pond levels, hail damage — the supporting evidence that rides alongside the rain record in program files.

Why we built it

Ranch decisions and USDA drought-program files (LFP, PRF) lean on the producer's own rain-gauge records, but those records live on a feed-store calendar. Popular apps are radar estimates rather than the producer's gauges, cap free gauges at two, meter gauges behind IAP tiers, or bundle rainfall into monthly ranch SaaS…

What makes it different

RainDrop is a radar-derived virtual gauge that needs a signal and caps free users at two locations; Rain Tally is single-location homeowner tracking; Mobble and AgriWebb bury rainfall inside monthly-subscription ranch SaaS; CoCoRaHS is internet-required single-station citizen science. The small paid diaries that do lo…

Who it's for

Built for anyone who values fast, private, on-device software with a calm, focused UX.

In one line: Rain gauge logbook, offline

Try it

See the Rain gauge logbook, offline for the full feature list, the info table, and support links.

Use RainBook, found a bug, or have a feature request? Comments are open below — anonymous is fine.