Comparison

RainVis vs Japan Weather Chart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RainVis

Visualize detailed weather data with customizable forecasts. Track rain, temperature, wind, tides, and solunar timing in one view. Ideal for outdoor planning and coastal activities.

Highlights
  • Customizable forecast metrics
  • Visual hourly previews
  • Expandable hourly charts
  • Coastal planning tools
  • Rain-focused forecast
  • Current conditions
  • Radar with history
Features
Read full description

RainVis turns detailed weather data into a visual forecast you can understand at a glance. Build your own forecast by choosing the details that matter most to you. Instead of jumping between separate hourly, daily, wind, rain, tide, and radar screens, RainVis lets you customize the forecast view around your plans. Track rain chance, accumulation, temperature, wind, gusts, humidity, pressure, dew point, cloud cover, tide height, tidal coefficient, and solunar timing in one visual forecast. Expand any day to inspect the hourly chart, compare multiple metrics together, and see when conditions line up. RainVis is especially useful for coastal fishing, boating, surfing, and outdoor planning, where the best window often depends on more than one number. Add tide and solunar details to your forecast to see tide movement, coefficient, moon timing, and major/minor activity periods alongside weather. Features: - Build-your-own forecast with customizable metrics - Compact daily forecast cards with visual hourly previews - Expandable hourly charts for rain, temperature, wind, gusts, humidity, pressure, dew point, cloud cover, tide, and solunar data - Coastal planning tools with tide height, tidal coefficient, NOAA tide source labels, moon data, and solunar activity periods - Rain-focused forecast showing chance, amount, timing, and accumulation - Current conditions for searched cities, saved places, or your current location - Radar with recent NEXRAD reflectivity history - iOS widgets for quick glanceable forecasts - Optional RainVis account for syncing Pro access across devices RainVis works immediately without signup. Free users can view the core visual forecast experience. RainVis Pro unlocks deeper planning features, including 15-day forecast trends, extended hourly forecast charts, longer radar history where available, live activities, and account-based access across iOS and web. Weather forecasts and coastal conditions can change quickly. Always follow official alerts and emergency guidance from the National Weather Service, NOAA, and local authorities. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://rainvis.com/privacy

About

Japan Weather Chart

Features
Read full description

An app for viewing weather charts around Japan in an easy-to-read timeline format, with widget support. ● Browse Weather Charts on a Timeline View surface weather charts in chronological order. ・Current weather charts (every 3 hours) ・24-hour forecast weather charts ・48-hour forecast weather charts ● Intuitive Controls Check weather charts right after launching the app. ・Swipe to switch between weather charts ・Freely move through time using the slider ・Pinch to zoom in on weather charts ・Tap to hide the UI and focus on the weather chart ● Home Screen Widget Displays the latest current weather chart on your home screen. Check the weather chart at a glance without opening the app. This app displays weather charts published on the Japan Meteorological Agency (JMA) website.

Screenshots

RainVis4 screens
Japan Weather Chart4 screens

Verdict

The call

The clearest difference is ads: RainVis at none against Japan Weather Chart's shown. RainVis also leads on update cadence (every 2 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RainVis sells 2 in-app purchases, starting at $1.99 per month and Japan Weather Chart sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RainVis ships an update every 2 days, Japan Weather Chart every 2 months. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
RainVis versus Japan Weather Chart: the parameters behind the verdict, then further details
ParameterRainVisJapan Weather Chart
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 days — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size15 MB14 MB
Age rating4+4+
DeveloperBrian HakelYuichiro Niwa

In-app purchases

2 purchases

RainVis

Subscriptions2
  • RainVis Pro Monthly$1.991 Month
  • RainVis Pro Annual$14.991 Year
2 purchases

Japan Weather Chart

One-time2
  • Support the developer$0.99
  • Remove Ads$2.99

Questions

Is RainVis free?
RainVis is free to download, with in-app purchases available.
Is Japan Weather Chart free?
Japan Weather Chart is free to download, with in-app purchases available.
Do RainVis or Japan Weather Chart have ads?
Japan Weather Chart shows ads; RainVis does not.
Which is updated more often, RainVis or Japan Weather Chart?
RainVis ships an update every 2 days, and Japan Weather Chart every 2 months. Most recently, RainVis was updated on October 31, 2026 and Japan Weather Chart on October 25, 2026.

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