Nebulo vs Local Haze
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nebulo
This app provides real-time air quality information based on the nearest weather station. It uses US EPA AQI Standards for reliable data, covering regions like Singapore, Malaysia, Thailand, and Hong Kong.
- Real-time air quality data
- Nearest weather station reports
- US EPA AQI Standards
- Support for Singapore, Malaysia, Thailand, Hong Kong
- Beautiful, minimalist interface
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Nebulo is a beautiful way to know the air that's choking you without choking your eyes. Now with support for Singapore, Malaysia, Thailand and Hong Kong, you can know the air around you based on the nearest weather station. Just open the app, and let it do it's magic! All of our data conforms to the US EPA AQI Standards, so you can rest assure we're giving you the best and most reliable data when you need it.
Local Haze
This app crowdsources outdoor air quality data from numerous global sensors, providing real-time readings and confidence ratings. It offers at-a-glance information on Apple Watch, phone widgets, and customizable notifications for significant air quality changes.
- Crowdsourced air quality data
- Global sensor network
- Sensor confidence ratings
- Apple Watch integration
- Phone widgets
- Air quality notifications
- EPA AQI display
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Local Haze crowdsources outdoor air quality data from many different sources and delivers it to your iPhone and Apple Watch. In release 2.3, as a Local Haze subscriber, you can now get air quality readings “at a glance” on your Apple Watch, widgets on your phone, and notifications for a sensor where significant changes in air quality have been detected. About Local Haze Local Haze reports air quality data from a variety of sensors across six continents, including AirGradient, AirNow, PurpleAir, Sensor.Community and uRADMonitor. In addition to viewing current air quality conditions, using Local Haze allows you to share sensor maps displaying air quality readings anywhere in the world. The World Health Organization and the U.S. Environmental Protection Agency (EPA) have developed guidelines for safe air quality as impacted by chemical pollutants and particulate matter (PM). PM smaller than 10 micrometers poses problems because it can enter the bloodstream. Local Haze displays the level of smaller PM 2.5 particles, which pose the most significant health risk. Local Haze Apple Watch app If you have disabled Automatic App Install on your Apple Watch, you can follow these directions to manually install it: https://support.apple.com/en-ca/guide/watch/apd99e3c6a68/watchos Local Haze Widgets A Local Haze widget allows subscribers, at a glance, to see a snapshot of their favorite AQ sensor. A tap on the widget displays the Local Haze sensor details screen. For directions on how to add a widget, visit this page: https://localhaze.humanlogic.com/2023/07/22/adding-a-local-haze-widget/ Notifications in Local Haze To set a notification, subscribers can tap the bell icon on the sensor details screen. Notifications will be sent to your phone when the air quality changes. How Local Haze Displays Air Quality Data Local Haze displays the EPA’s Air Quality Index (AQI) and a confidence rating for each sensor reading. The confidence rating is a feature that is unique to Local Haze and depends on many factors, including sensor maintenance and data freshness. Each AQ sensor reading is displayed as a face icon according to the key below, with a badge on the lower right that represents a confidence rating: Green Face: Air quality is Good. Air quality is considered satisfactory, and air pollution poses little or no risk. Yellow Face: Air quality is Moderate. Air quality is acceptable. For some pollutants, there may be a moderate health concern. Orange Face: Air quality is Unhealthy for sensitive groups. The general public is not likely to be affected, but people with heart and lung disease, older adults, and children are at greater risk. Red Face: Air quality is Unhealthy Everyone may begin to experience some adverse health effects, and members of the sensitive groups may experience more serious effects. Black face mask with respirator: Air quality is Hazardous. Everyone may experience more serious health effects with possible emergency conditions. The entire population is likely to be affected. Note: The source for the above AQ index classification is from Air Quality Index (AQI) Basics - EPA: https://www.airnow.gov/aqi/aqi-basics/ The confidence rating badges are: Green badge with thumbs up: High confidence in the air sensor reading. Yellow badge with OK sign: OK confidence in the air sensor reading. Red badge with thumbs down: Low confidence in the air sensor reading. We hope you enjoy using Local Haze! If you have any feedback about Local Haze please email us at localhaze@humanlogic.com or visit https://localhaze.humanlogic.com/
Screenshots
Verdict
The clearest difference is rating: Local Haze at 4.6 against Nebulo's 4.0. Local Haze also leads on ratings volume (32 vs 1). Nebulo's advantage is in-app purchases (none vs 2) and update cadence (every 4 weeks vs every 3 months). On price, review sentiment, 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. Local Haze sells 2 in-app purchases, starting at $0.99 per month. Nebulo asks for nothing beyond the download.
Local Haze holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Local Haze has 32 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Nebulo's written reviews are positive against 79% of Local Haze's.
Nebulo ships an update every 4 weeks, Local Haze every 3 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.
| Parameter | Nebulo | Local Haze |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.6 (32 ratings) — better |
| Positive reviews | 75.0% of reviews | 78.9% of reviews — better |
| Number of ratings | 1 | 32 — better |
| Update frequency | Every 4 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 12 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Undertide LLP | HumanLogic |
Customer experience
Nebulo
Local Haze
In-app purchases
Nebulo
No in-app purchases
Local Haze
- All Access - Monthly3 Days trial$0.991 Month
- All Access - Annual3 Days trial$9.991 Year









