Introducing Air & Environment

The air you breathe
has a number.

Move through it. Every speck here is a particle you breathe in.

SHINDO's Air Quality screen: European AQI 42, Moderate, with today's hourly chart for Setagaya.
Four readings, one glance

The sun, the air, the pollen and the moisture around you change every hour, and each one comes with its own scale, its own units and its own jargon. SHINDO reads them for your exact location, turns each into one number and one sentence — sunscreen or not, run outside or not, take your antihistamine or not — and tells you when the air turns poor.

UV index 4, Moderate — sunscreen advised for time outside.
UV indexWhen to cover up, and until when.
Air quality 41, Moderate — PM2.5 17.5 µg/m³; sensitive groups limit exertion.
Air qualitySeven pollutants folded into one index.
Pollen and allergy: no reading for this area — no precautions needed.
PollenFive species, tracked through the season.
Dry air 53%, Comfortable — dew point 55°F, comfortable indoor range.
HumidityHow the air actually feels, by dew point.
Setagaya · now
UV index

Cover up between 11 and 4. SHINDO tells you before you step out.

06:00
SHINDO's UV Index screen: 5 Moderate at 12:49 PM, peak today 5, UV begins 8 AM, peaks 11 AM, ends 4 PM.
  1. 0–2Low
  2. 3–5Moderate
  3. 6–7High
  4. 8–10Very high
  5. 11+Extreme
How small is PM2.5?

Thirty times thinner than a hair.

PM2.5 particles are 2.5 micrometres or smaller — small enough to slip past your nose and throat and reach deep into your lungs. Keep scrolling to shrink down to their size.

Sizes to scale. Comparison after the U.S. Environmental Protection Agency's particle-size illustration.

Air quality, decomposed

One index. Seven ingredients. Tap any of them.

Values as shown in the app at 12:49 PM on 18 October 2026, Setagaya. Each pollutant gets its own chart style, so you never confuse one for another.

Overall European AQI 42, bar chart by hour. PM2.5 18 µg/m³, area chart peaking before 6 AM. PM10 22 µg/m³, bar chart by hour. NO2 21 µg/m³, line chart falling through the morning. Ozone 86 µg/m³, step chart rising through the afternoon. SO2 16 µg/m³, dot-matrix chart. CO 182 µg/m³, lollipop chart.
Air quality alerts

When the skyline fades, your phone knows first.

Switch on one toggle and SHINDO warns you when the European AQI for your area reaches Poor, and again at Very Poor. Never between 10 PM and 7 AM, and never more than once per level per day. Drag the index to try it.

42
SHINDO's Air Quality Alerts setting: warn me when air quality drops — a notification when the European AQI for your area reaches Poor, and again if it reaches Very Poor; quiet between 10 PM and 7 AM.
Pollen · 花粉

Hay fever runs on a calendar. SHINDO reads it species by species.

Cedar, cypress, grass, ragweed and mugwort — each reported separately on the 0–5 Universal Pollen Index for a 1 km area around you. Out of season, SHINDO says so plainly instead of showing a zero that looks like good news.

Wheel shows typical seasons in Japan, after the Ministry of the Environment's pollen manual: cedar and cypress in spring, grasses spring to early autumn, ragweed and mugwort late summer to autumn. Exact timing varies by year and region.

SHINDO's Pollen screen on 18 October: no reading — nothing measurable today; the cedar and cypress season runs roughly February to May.
Dry air · humidity

Same 52%. Very different air.

Relative humidity depends on temperature, so 52% in August and 52% in January feel nothing alike. SHINDO shows the dew point beside it — the more honest measure of how the air actually feels — plus today's range and how many hours sat in comfortable air.

Now
0%
24h high
90%
24h low
51%
Dew point
53°F 12°C
Comfort hours
7h / 24h
SHINDO's Dry Air · Humidity screen: 52%, Comfortable, dew point 53°F, 24-hour high 90%, low 51%, 7 of 24 comfort hours.

SHINDO knows what's in the air today,
before you take a breath of it.

Get SHINDO first.

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QR code linking to the SHINDO download page

UV index, air quality, pollutant concentrations and humidity: weather and air-quality data by Open-Meteo.com (CC BY 4.0), generated using Copernicus Atmosphere Monitoring Service (CAMS) information — a computed grid, not a street-level sensor. European AQI bands: Good 0–20, Fair 20–40, Moderate 40–60, Poor 60–80, Very poor 80–100, Extremely poor above 100. Pollen: Google Pollen API (Universal Pollen Index), pollen data © Google.

Screens show the SHINDO app on 18 October 2026, Setagaya, Tokyo; the four-card dashboard was captured a few minutes earlier than the detail screens. SHINDO gives general guidance, not medical advice — if you have asthma, allergies or another condition, follow your doctor's advice. All data sources.