Comparison

Flowgraphy vs Zasder Weather

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

Head to head
About

Flowgraphy

This weather application transforms real-time data into visually appealing scenes and an intuitive interface. It allows users to understand current conditions like rain and temperature changes at a glance, making weather forecasting both clear and beautiful.

Highlights
  • Graceful scene visualizations
  • Intuitive interface
  • Real-time weather data
  • Rain and temperature display
  • Sky condition overview
  • Day planning assistance
Features
Read full description

A weather app, reimagined. Flowgraphy turns real‑time data into graceful scenes and an intuitive interface that together reflect today’s rain, temperature changes, and the sky ahead — all at a glance. Whether you’re planning your day or simply enjoying the view, Flowgraphy lets you feel the forecast — clearly and beautifully. Terms of Use: https://www.flow-graphy.com/terms.html Privacy Policy: https://www.flow-graphy.com/privacy.html

About

Zasder Weather

This app provides a private and customizable weather experience for personal weather stations. Connect your own backend to manage your data securely, with no ads or subscriptions. Supports multiple weather sources and offers detailed insights, charts, and custom alerts.

Highlights
  • Multi-station dashboard
  • Historical data and insights
  • Detailed charts
  • Custom alerts
  • Apple Watch app
  • Home Screen widgets
  • Flexible units
Features
Read full description

Zasder Weather is a clean, fast app for personal weather stations on iPhone, Apple Watch and Mac. One purchase, every platform. It is bring-your-own backend: point it at your own server, and your station's data is yours, end to end. No ads, no tracking, no subscriptions. WORKS WITH YOUR STATION • AmbientWeather, Davis WeatherLink, WeatherFlow Tempest and Ecowitt from their clouds, an Ecowitt gateway posting straight to your server, or a WeatherLink Live read on your network for two-second freshness. • Direct radio capture: a $20 LilyGO board decodes AcuRite Atlas or Fine Offset, Ecowitt and Ambient sensors off the air. • AirGradient and Govee air monitors with CO2 and PM2.5, and soil probes on up to eight channels. • No server yet? The Mac app builds one on your Fly.io account in a minute, or run the backend in Docker. THE DASHBOARD • Live conditions, a 24-hour curve, today's highlights ranked against your own record, the moments the weather changed, and a strip that says hour by hour whether each source was healthy. • Arrange every screen: drag the cards into your order, hide what you do not need, and do the same for Charts. • A 7-day forecast with a written narrative, tap a day for its full text, and a scorecard of how right the forecast has been at your station. • Charts with a wind rose, station comparison, and drag to inspect. Explore any past day. Records in under a second. Insights, a year heatmap and a Science page of derived numbers. ALERTS THAT ARRIVE • Thresholds on any field, evaluated on your server, by push and email even when the app is closed. • Weather watches with no setup: lightning nearby with an all clear, frost, heat, a fast pressure drop, a gust front, the first frost, low batteries and a sensor gone quiet. • Severe weather from the National Weather Service, one family at a time: mute floods and keep tornadoes, with a warning that sounds different from a watch. • Storm summaries after the rain ends: total, peak rate, temperature drop and top gust, as a push, an email card or both. • Live Activities on your Lock Screen for the rain countdown, a storm in progress, lightning nearby, a wind ramp, a freeze night and a heat day, and they reach the Apple Watch Smart Stack. • Quiet hours, a morning report and an evening outlook at the minute you choose, sky notes before sunset, and report emails in the look you pick. SHARE IT • Read only links for family with one tap setup, and Sites to keep every server you are given beside your own. • Your station on the shared map at maps.zasder.com with the location rounded as much as you like. • Send your readings to Weather Underground, PWSweather, Windy, Weathercloud, CWOP, Met Office WOW, AWEKAS and OpenWeatherMap. • Story cards from your own record, a public dashboard page to embed on your site, NOAA-style reports, and an AI assistant connected to your server. ON YOUR WRIST AND HOME SCREEN • Apple Watch app with configurable complications and a Big complication per reading. • Home Screen and Lock Screen widgets, editable per widget, a dashboard widget the size of a page, and a widget that follows the station you choose. • Siri: ask for any reading, the forecast, rain totals or records, in your units. Your stations appear in Spotlight. YOUR DATA, YOUR RULES • Bring years of history from Weather Underground, a WeeWX database, or any CSV, and export every reading to CSV. • Calibrate any sensor with an offset or a scale, typed in your units. • Units: °F or °C, mph, km/h, knots, m/s or Beaufort, in or mm, inHg or hPa. Light, dark, or automatic. Dynamic Type throughout. • Settings backed up to iCloud, the server's database backed up from the app, one-tap server updates. The backend is open source (MIT): https://github.com/volneydouglas/zasder-weather-backend Data goes only to your server and what you opt into. Optional tip jar via In-App Purchase, purely cosmetic; nothing is paywalled. Requires iOS 18.

Screenshots

Flowgraphy4 screens
Zasder Weather4 screens

Verdict

The call

The clearest difference is ads: Zasder Weather at none against Flowgraphy's shown. Zasder Weather also leads on monetization model (free vs free with in-app purchases) and update cadence (every 5 days vs every 3 weeks). Flowgraphy's advantage is ratings volume (5 vs 1). On price, in-app purchases 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. Flowgraphy sells 2 in-app purchases, starting at $0.99 per month and Zasder Weather sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Zasder Weather holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Flowgraphy has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Flowgraphy ships an update every 3 weeks, Zasder Weather every 5 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Flowgraphy versus Zasder Weather: the parameters behind the verdict, then further details
ParameterFlowgraphyZasder Weather
PriceFreeFree
Rating4.8 (5 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings5 — better1
Update frequencyEvery 3 weeksEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, Mac, Apple Watch — better
Requires iOS17.6 — better18.0
Further details — not scored
Size169 MB21 MB
Age rating4+4+
DeveloperFlowgraphy StudioZasder LLC

Customer experience

Flowgraphy

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Zasder Weather

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Flowgraphy

Subscriptions2
  • Flowgraphy+ (Monthly)$0.991 Month
  • Flowgraphy+ (Annual)1 Month trial$9.991 Year
4 purchases

Zasder Weather

One-time4
  • Buy me a coffee$0.99
  • Buy me a latte$4.99
  • Buy me lunch$19.99
Show 1 more
  • Buy me dinner$29.99

Questions

Is Flowgraphy free?
Flowgraphy is free to download, with in-app purchases available.
Is Zasder Weather free?
Zasder Weather is free to download, with in-app purchases available.
Which has better reviews, Flowgraphy or Zasder Weather?
Zasder Weather is rated higher. Flowgraphy averages 4.8 out of 5 from 5 ratings, while Zasder Weather averages 5.0 from 1 ratings.
Do Flowgraphy or Zasder Weather have ads?
Flowgraphy shows ads; Zasder Weather does not.
Which is updated more often, Flowgraphy or Zasder Weather?
Flowgraphy ships an update every 3 weeks, and Zasder Weather every 5 days. Most recently, Flowgraphy was updated on October 28, 2026 and Zasder Weather on October 24, 2026.

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