PWS Display vs Where's Karl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PWS Display
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PWS Display turns any iPhone or iPad into an always-on dashboard for your personal weather station. It connects directly to your existing weather station account — no separate backend, no account with us required: • Netatmo • Weather Underground (Wunderground PWS) • WeatherFlow Tempest • Davis WeatherLink FEATURES • Live dashboard with whatever your station reports: outdoor/indoor temperature, humidity, pressure, wind speed/gust/direction, rain rate and daily total, dew point, feels-like temperature, UV index, solar radiation, CO2, noise, lightning strikes and distance, illuminance • Local history chart, built up automatically over time on your device • Designed for wall-mounted iPads: the layout scales to fill any screen, keeps the display awake, and can pause automatically during a configured night window • Configure multiple stations and switch between them • Metric or imperial units • Configurable refresh interval • Available in 19 languages PRIVACY PWS Display has no backend and no analytics. Your weather station credentials and history stay on your device only; the app connects only directly to the provider you configure. Full privacy policy available in the app and at: https://sites.google.com/view/pwsdisplay-privacy-en PWS Display is an independent app and is not affiliated with or endorsed by Netatmo, The Weather Company, WeatherFlow, or Davis Instruments.
Where's Karl
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Bay Area weather can change in just a few miles. Where’s Karl helps you see where the fog is, where skies are clearing, and what conditions look like across the Bay Area. Whether you’re planning a walk, heading to the beach, crossing the Bay, or just wondering if the sun is out somewhere nearby, Where’s Karl makes it easy to check before you go. TRACK KARL See current fog and weather conditions across locations throughout the Bay Area. EXPLORE THE BAY Use the map to compare conditions around San Francisco, the North Bay, East Bay, South Bay, and Peninsula. CHECK LOCAL CONDITIONS Open a location for a closer look at current conditions and weather information. SAVE YOUR FAVORITES Keep the places you check most often close at hand for quick access. FIND CLEARER SKIES When one part of the Bay is buried in fog, another may be enjoying blue skies. Where’s Karl helps you see the difference. From foggy mornings to sunny afternoons, the Bay Area always keeps things interesting. Where’s Karl helps you see the Bay more clearly.
Screenshots
Verdict
The clearest difference is update cadence: Where's Karl at weekly against PWS Display's monthly. PWS Display's advantage is device support (3 vs 1). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PWS Display ships an update monthly, Where's Karl weekly. Both last shipped on October 31, 2026.
| Parameter | PWS Display | Where's Karl |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Number of ratings | — | 4 — better |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 20 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Werner Kolov | Chelsea Montanaro |
In-app purchases
PWS Display
No in-app purchases
Where's Karl
No in-app purchases









