Ilma
Nearby RuuviTag readings
Free · In‑App Purchases
Ilma needs a RuuviTag nearby. Without one, there is nothing to claim or read.
Ilma is a small iPhone app for RuuviTag sensors. Claim a tag nearby, and see a calm native reading.
It is built on restraint. Temperature is the hero. You also get the name you chose, humidity, dew point, pressure, and battery. Ilma shows what most people want to see when checking a room or a space. Ruuvi's official app and docs cover the rest for power users.
Live values need the tag nearby. When it is not, Ilma keeps the last reading it heard. Home Screen, Lock Screen, and StandBy widgets show that last-heard temperature and when it was recorded. Each widget shows one named tag you choose.
Reorder claimed sensors on iPhone. Watch and widgets follow your order. With more than one tag claimed, the Watch app pages between them when you are nearby.
A small Apple Watch companion shows the same claimed sensors when you are nearby. The list comes from iPhone and syncs automatically. Ilma does not read tags in the background. It is not a remote dashboard.
Names and last readings can stay in your iCloud so they survive a reinstall and show up on your other iPhones. That data is yours, in your Apple account. We do not collect it, and we cannot see it.
Ilma is free. Every feature is included from the first launch. This is not freemium. Nothing is locked behind a tip or a subscription. The optional Tip Jar in About is only if you want to buy me a coffee. It never unlocks anything, and the app never nags.
No account. No tracking. No third-party code. Ilma is built for most people to use without restrictions, with privacy by default and system accessibility on iPhone, including Larger Text, Reduced Motion, and VoiceOver.
Features
• Claim nearby RuuviTag sensors. Home shows only the ones you named
• Drag to reorder claimed sensors. Watch and widgets follow
• Temperature as the hero (°C / °F from your iPhone language)
• Humidity, dew point, pressure (hPa), and battery on the detail screen
• Last-heard reading when a tag is out of range
• Home Screen, Lock Screen, and StandBy widgets. Pick one named tag per widget
• Light and Dark Mode. Home Screen icon in Default, Dark, Clear, and Tinted
• Apple Watch companion for claimed sensors when nearby. Swipe between multiple tags
• Personal iCloud for names and last snapshot (reinstall and your other devices)
• Free with every feature included. Optional Tip Jar never required
• On-device Bluetooth. Larger Text, Reduced Motion, and VoiceOver on iPhone
Ratings & Reviews
Ilma matches your iPhone language automatically. Change it in the Settings app. Available in English, Finnish (suomi), Swedish (svenska), French (Français), German (Deutsch), Polish (Polski), Thai (ภาษาไทย), Japanese (日本語), and Korean (한국어).
Nearby unclaimed Ruuvi sensors now show four unique characters so they are easier to tell apart.
Pressure follows your iPhone region, like temperature (°C/°F), so you see inHg or hPa.
Also, minor UI and bug fixes throughout the app to make the experience even smoother.
The developer, Yoji Hirabayashi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
For more information, visit the developer’s accessibility website .
Information
- Seller
- Yoji Hirabayashi
- Size
- 5.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
English and 8 more
- English, Finnish, French, German, Japanese, Korean, Polish, Swedish, Thai
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Flat White $3.99
- Iced Pumpkin Spice Mocha $8.99
- Espresso $1.99
- Copyright
- © Yoji Hirabayashi