Secondhand Air

Weather

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Wildfire smoke is smoke. Secondhand converts the air where you are into cigarettes — so you know when to stay in. Breathing a full day of polluted air can equal smoking actual cigarettes. Secondhand reads the PM2.5 where you are and converts it into the only unit everyone understands. TODAY — one big number: how many cigarettes today's air is worth, with a 24-hour forecast so you know when it clears. LOG — your season, tracked automatically. Packs filled, daily heatmap, worst day. PLACES — save cities, compare their air. "12× more smoke in Boise. Drive north." ALERTS — set your line in cigarettes, not AQI. One notification when the day crosses it. Plus a calculator: going out 2 hours = how many cigarettes? ASHCASH — flip it around. If you actually smoke, see what quitting buys back: money per week, year, decade — and days of life regained. Data from the EPA AirNow monitor network and the Open-Meteo air quality model. Everything stays on your phone: no accounts, no tracking, nothing leaves the device. Conversions are estimates for awareness (1 cigarette ≈ 22 µg/m³ PM2.5 over 24h, Berkeley Earth; ~20 minutes of life per cigarette, Jackson et al. 2024), not medical advice.

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The developer, Fudo Jahic, 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

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    Information

    Seller
    Fudo Jahic
    Size
    1.9 MB
    Category
    Weather
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    9+
    Copyright
    © 2026 Fudo Photo LLC
  • Privacy Policy

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