Comparison

Teapot for Tempest vs Caelo

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

Head to head
About

Teapot for Tempest

This app provides a locally displayed console for your Tempest Weather System, showing real-time observations and hyper-local forecasts. It offers multiple display views for detailed weather data, storm tracking with radar maps, and extended forecast periods.

Highlights
  • Real-time weather observations
  • Hyper-local forecasts up to 10 days
  • Multiple display views (Main, Storm, Forecast)
  • Live weather radar map
  • Rainfall calibration function
  • Light/dark mode options
  • Customizable map embeds
Features
Read full description

Good news for owners of the Tempest Weather System by WeatherFlow-Tempest, Inc. Now you can have a locally displayed console specifically designed to display your weather observations and hyper-local forecasts on a single screen in real-time. You can also get daily and hour-by-hour forecasts for up to 10 days. Choose from different "Main"view displays that offer numerous ways to view your weather observations. Easily view all the relevant data necessary to keep tabs on conditions such as temperature, humidity, wind speed, wind gusts, daily rain, rain storm totals, rain rate, and sky conditions such as UV, LUX and solar radiation. It also displays sunrise and sunset. Or you can choose the alternate display with just the basics enlarged for easy viewing from a distance. The "Storm" view displays all the above items except sky conditions. In its place, Teapot for Tempest displays a live weather radar map for your location. It updates automatically so no user intervention is necessary. Whenever you are expecting a storm, all you need to do is tap the 'Storm View" icon, and everything you need to see will be right there. The "Forecast" view displays detailed hyper-local forecasts for up to 7 days as well as hour-by-hour forecasts for the same periods. Installation and setup takes less than 5 minutes and your weather readings will be immediately streamed to your device in real time wherever you are. Your weather data stays private. Only devices you approve can look at your data. Teapot for Tempest offers Nearcast compatibility as well as a unique rainfall calibration function that helps to improve your rainfall display accuracy. By using another weather station or simple rain gauge as a comparison, you can adjust your rainfall readings to an actual "known accurate" rain collector. This will greatly improve your rainfall reading accuracy. It uses a simple slider to adjust plus or minus percentages that is non-destructive. It only modifies the displayed reading, and leaved the underlying raw data in its original state. Teapot also allows you to select light or dark modes overriding your system settings, or you can choose to follow your system settings. Teapot for Tempest uses its own weather radar map using Apple Maps and radar data from RainViewer. You're not limited to our map however. We have provided a mechanism to allow any embeddable map you may prefer. Several weather providers offer embedded maps for personal use. To embed an alternative weather radar map, all you need is the URL from the provider. And, if you need any help, we're happy to assist you. Teapot for Tempest is available in the Apple App Store Subscription is required. Annual Subscription is $9.99 US billed annually. Monthly Subscription is $0.99 per month, billed monthly. Family Sharing is supported. Privacy Policy is available here: https://teapotapp.com/privacy/ Terms of use (EULA) is available here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Legal: Tempest is a trademark of WeatherFlow-Tempest, Inc. and used with permission. (https://weatherflow.com/tempest-home-weather-system/) ** We are not affiliated with WeatherFlow-Tempest, Inc. Radar Overlay Data is provided by RainViewer with permission. (https://www.rainviewer.com) RainViewer radar data is derived from open source contributors and is free for personal and commercial use. RanViewer is a trademark of RainViewer, MateoLab, Inc

About

Caelo

Features
Read full description

Your sky's quiet lookout — honest, even when it's "not tonight." Caelo knows your sky because you mapped it: the trees, the fence line, the roof next door, whatever actually stands between you and a clear shot of the night sky. Caelo Pro puts that horizon to work everywhere it matters. Open your Observing Plan and every recommendation already accounts for your yard. Not a generic transit time off a star chart, but the real window: when a target clears your roof, and when it drops behind next door's oak tree. A flat-horizon planner can't do that. Pro plans your night, not a generic one. Pro also shows you further ahead: This Week lays out seven nights of visibility at a glance, and This Year shows the whole season a target climbs through your sky, so you can plan around months instead of guessing at them. Caelo would rather tell you "not tonight" than send you out for nothing.

Screenshots

Teapot for Tempest4 screens
Caelo4 screens

Verdict

The call

The clearest difference is update cadence: Teapot for Tempest at every 8 days against Caelo's every 3 weeks. Teapot for Tempest also leads on device support (3 vs 1) and iOS requirement (15 vs 18.0). On price, ads and in-app purchases 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. Teapot for Tempest sells 2 in-app purchases, starting at $1.99 per month and Caelo sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Teapot for Tempest ships an update every 8 days, Caelo every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Teapot for Tempest versus Caelo: the parameters behind the verdict, then further details
ParameterTeapot for TempestCaelo
PriceFreeFree
Rating3.9 (47 ratings) — better—
Positive reviews54.5% of reviews—
Number of ratings47 — better—
Update frequencyEvery 8 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15 — better18.0
Further details — not scored
Size15 MB16 MB
Age rating4+4+
DeveloperBrian MILBURNPaul Jeffrey Smith

Bugs and requests

Teapot for Tempest

Reported bugs

17 issues
  • App crashes immediately on launch
  • No data received despite successful connection
  • Barometric pressure reading seldom shows
  • Error on the forecast screen
  • Tripled reported wind speeds
Show 12 more
  • Kept telling the wrong station ID
  • App not functioning properly, not reading data
  • Tempest app no longer works after installing this app
  • Station removed from Tempest app
  • App crashes within a fraction of a second
  • Forecast button yields a blank page
  • App takes too long to populate data when first opened
  • App crashes on me every time I open it
  • App is extremely buggy and consistently crashes/loses local station information
  • Connection issues, no data received
  • Incorrect data readings (wind speed, station ID)
  • Forecast screen shows blank page

Requested features

12 requests
  • Display historical data in graphs
  • Widget for Home Screen
  • Offset temperature and humidity
  • More documentation on data meanings
  • History and stats
Show 7 more
  • Graphing and trending
  • Historical data replay
  • More details on battery status
  • Options for other screen designs (landscape)
  • Show all data points without scrolling
  • Flexibility to add/remove all Tempest items
  • Larger wind direction indicator

Caelo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Teapot for Tempest

Subscriptions2
  • Monthly Subscription$1.991 Month
  • Annual Subscription$12.991 Year
4 purchases

Caelo

One-time4
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$2.99
Show 1 more
  • Caelo Pro$3.99

Questions

Is Teapot for Tempest free?
Teapot for Tempest is free to download, with in-app purchases available.
Is Caelo free?
Caelo is free to download, with in-app purchases available.
Do Teapot for Tempest or Caelo have ads?
Neither Teapot for Tempest nor Caelo shows ads.
Which is updated more often, Teapot for Tempest or Caelo?
Teapot for Tempest ships an update every 8 days, and Caelo every 3 weeks. Most recently, Teapot for Tempest was updated on November 3, 2026 and Caelo on November 5, 2026.

Other comparisons