Mr. Chilly vs Where's Karl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mr. Chilly
This app provides detailed weather information for San Francisco's diverse microclimates and the entire Bay Area. View current temperatures, future forecasts, and dynamic heatmaps to plan your outdoor activities.
- Hourly forecasts (24 hours)
- Dynamic temperature heatmaps
- Day/night cycle visualization
- San Francisco microclimate view
- Bay Area and Peninsula weather
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See the weather in San Francisco’s different microclimates, or zoom out to check the whole Bay Area! View the temperature in various neighborhoods and towns, and check out future forecasts. Want to see if Dolores Park is warm enough to pop open an ice cold… water? Need to choose between Ocean Beach and Half Moon Bay? Mr. Chilly has your back. Features: - Accurate hourly forecasts for the next 24 hours - Dynamic temperature heatmaps - Day/night cycle - Check San Francisco's microclimates or zoom out to see the Bay Area / Peninsula Mr. Chilly was created by: Alexander Chia & Anna Bleker.
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 in-app purchases: Where's Karl at none against Mr. Chilly's 1. Where's Karl also leads on update cadence (weekly vs every 5 weeks). Mr. Chilly's advantage is ratings volume (7K vs 4) and iOS requirement (13.0 vs 16.4). On price, rating, ads and device support 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. Mr. Chilly sells 1 one-off in-app purchase. Where's Karl asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Mr. Chilly against 5.0 for Where's Karl. That said, the two scores are not equally well evidenced: Mr. Chilly has 7K ratings behind it against 4, so its average is the more settled of the two.
Mr. Chilly ships an update every 5 weeks, Where's Karl weekly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | Mr. Chilly | Where's Karl |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (7K ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 86.5% of reviews | — |
| Number of ratings | 7K — better | 4 |
| Update frequency | Every 5 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 12 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Chia | Chelsea Montanaro |
In-app purchases
Mr. Chilly
- No Ads$1.99
Where's Karl
No in-app purchases
