Vesper Sky vs OpenWeer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vesper Sky
Read full descriptionHide full description
Vesper Sky is an editorial weather app. Where other apps give you a grid of numbers, Vesper Sky gives you a sentence about the sky — the kind a thoughtful friend would write if they'd just stepped outside. It isn't for the storm chaser or the pilot. It's for the person who opens a weather app three times before noon and wants the one line that tells them whether the jacket was the right choice. VESPER SKY INSTRUMENT CALIBRATION • Proprietary ML sunset forecasting — built on years of observed sky data, the model grades its own predictions and tracks accuracy over time • Atmospheric inputs — cloud cover, humidity, pressure, and sun position fed through a premium scoring pipeline • Editorial wardrobe & style briefs — AI-generated fiber notes (merino, linen, boucle) written for the day's actual conditions, not generic temperature bands • Dynamic Island + Live Activities for sunset countdown • Home Screen widgets — 7 kinds, all sizes • Apple Watch app with sunset complications SIGNATURE FEATURES — Sunset Verify: rate the sky you actually saw. Vesper Sky scores itself against your rating and builds your verification history over time. — The Sky tab: live radar overlaid on a custom dark map, with an editorial card that tells you in plain language what the atmosphere is doing right now — not just in numbers. — What to Wear: three silhouettes (woman, man, child) with biometric-accurate outfit recommendations, each fabric chosen for the day's precise feels-like temperature, humidity, and wind. — Journal: every sunset you rated, every outfit you built, every sky that meant something — saved to your device, never uploaded. DESIGN PHILOSOPHY Vesper Sky is built like an instrument, not an ad-supported utility. The color system is monochrome: pure white telemetry with Solar Gold and Frosted Indigo accents where intensity matters. The map is Deep Navy Clay. The typography is Sofia Pro for body, futura-pt for display. Every surface earns the word "premium." Weather, worth reading. PRICING & TRIAL Vesper Sky is a paid app with a 3-day free trial. After trial: • Monthly — $2.99/mo • Annual — $24.99/yr (saves 30%) • Lifetime — $59.99 (one-time, no subscription) Cancel any time in iOS Settings → Apple ID → Subscriptions. PRIVACY Vesper Sky does not sell your data. Photos stay on your device. Journal entries stay on your device. Anonymous location is sent to weather providers only to return weather for where you are. Full privacy policy: https://vespersky.ai/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://vespersky.ai/terms Privacy Policy: https://vespersky.ai/privacy Support: brief@vespersky.ai
OpenWeer
Read full descriptionHide full description
The clearest rain radar for the Netherlands. Open, honest, ad-free. Built on the official rain and weather data from KNMI — the same source used by Dutch journalists and meteorologists. No account. No tracking. No hidden subscriptions. Just knowing whether to grab a jacket. LIVE RAIN RADAR See up to two hours ahead, anywhere in the Netherlands. The radar plays back at a smooth 60 fps, with a time slider that responds the way you'd expect. Zoom in to street level, zoom out to the whole of Europe. 8-DAY HOURLY FORECAST Temperature, chance of rain, wind speed and direction — everything in one view, for any point in the country. RAIN ALERTS THAT MAKE SENSE One push notification just before it starts raining at your location. Not ten. OpenWeer reads the KNMI radar every five minutes and knows exactly when to ping you. WIDGETS AND LIVE ACTIVITY Put the weather and rain radar on your Home Screen or Lock Screen. During a shower, the Dynamic Island shows a live countdown — no need to open the app. ASK OPENWEER "Should I leave now to get home dry?" "Can I hang the laundry outside?" Ask in plain English and get an answer grounded in the latest measurement. PRIVACY BY DEFAULT • Fully open-source under the MIT license. Read the code on GitHub. • Weather data from KNMI (CC-BY-4.0), credited as required. • No account, no ads, no tracking. Your location stays on your phone. • No ad networks, no analytics cookies, no hidden costs. MADE IN THE NETHERLANDS OpenWeer is an independent project running on open data and open code — for anyone who wants to know what the weather's doing, without the noise. Ideas, issues, or pull requests welcome at github.com/openweer/openweer.
Screenshots
Verdict
The clearest difference is in-app purchases: OpenWeer at none against Vesper Sky's 3. OpenWeer also leads on update cadence (every 5 days vs monthly). On price, ads, 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
Both are free to download. Vesper Sky sells 3 in-app purchases, starting at $2.99 per month. OpenWeer asks for nothing beyond the download.
Vesper Sky ships an update monthly, OpenWeer every 5 days. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.
| Parameter | Vesper Sky | OpenWeer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 126 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | iSimplifyMe LLC | Brthrs Agency |
In-app purchases
Vesper Sky
- Vesper3 Days trial$2.991 Month
- Vesper Annual3 Days trial$24.991 Year
- Vesper Lifetime$59.99
OpenWeer
No in-app purchases









