Pollen · for people with hay fever
Pollergo is an allergy forecast app for people with hay fever who only want to know about the pollen that actually bothers them. Pick the pollen types that bother you, plus fine dust if it matters to you, and the Today screen switches from the area's overall level to your own index, with a line naming the allergen driving it. Pollen forecasts come from the German Weather Service (DWD) for 27 regions of Germany and from the European CAMS forecast via Open-Meteo for eight European cities. Your allergen list and your location never leave the phone.
Tell Pollergo you react to grass and birch, and the big word on Today stops describing the area's worst pollen. It becomes your index: the highest level among your allergens, with a line such as Driven by Grass. Your allergens are listed first, and the rest of the day's readings follow underneath.
The pollen list follows your region's source, eight types in Germany and six in the European cities, plus one Dust & air switch for fine dust. Tap what bothers you and save. The profile is saved on the phone and never uploaded.
The Week tab lists each day the source covers, three from the German Weather Service and four from the CAMS forecast, with your level and the allergens behind it. After that the list stops, and a line says why instead of padding the week with guesses. A toggle at the top switches between My allergens and All.
A typical pollen forecast is a table for an area: hazel, alder, ash, birch, grass, rye, mugwort and ragweed, each with its own level. If birch is your problem, you read down the list every morning looking for one row, and a headline that says High may be about a tree you have never reacted to. General weather apps squeeze the same table into a single pollen icon, which is quicker to read and tells you even less.
Pollergo starts with the area view. Allow location once or choose a city, and Today shows the overall index for your region, the highest level across every allergen the source reports. A card then offers to make it personal. Once you save a profile, the headline answers the question you opened the app for: how bad is it today for the things I react to.
In Germany, Pollergo uses the pollen hazard index (Pollenflug-Gefahrenindex) from the German Weather Service, DWD: 27 forecast regions, eight pollen types, and a forecast for today, tomorrow and the day after. For London, Paris, Amsterdam, Madrid, Rome, Vienna, Zurich and Warsaw it uses the CAMS European air quality forecast through Open-Meteo, which covers six pollen types and fine dust (PM10 and PM2.5) four days ahead. For ten US cities and eight cities in Japan only the fine dust forecast exists in the sources Pollergo uses, so that is all it shows there.
Each source speaks its own scale. DWD reports steps from 0 to 3 with half steps in between; CAMS reports grains of pollen per cubic metre. Pollergo puts every reading on one five-step scale, None, Low, Moderate, High and Very high, so the colours mean the same thing everywhere, but it never hides the original. Every card shows the raw value, the scale it came from and the source, for example 142 grains/m³ (daily max), Source: open-meteo.
Pollergo's server collects these public forecasts on a schedule, and the app asks it for one region at a time. If a source stops updating, the last forecast stays on screen with a note such as Last updated 30h ago rather than passing for fresh. The Data sources screen in Settings lists each source with its attribution and the time it was last collected.
On iPhone, the home screen widget answers before you open anything: your region, today's level in its colour, and the allergens driving it. The medium size adds tomorrow's level. Open the app and Today has the same index on top, a card for each allergen below it, and a Tomorrow row, so you know what the next day looks like before you plan it.
If you want a nudge, turn on notifications in Settings and pick a briefing time of 6, 7, 8 or 9 a.m. The morning message carries your region's overall level. A second alert comes when tomorrow's regional level is at least two steps above today's and reaches High or more, once per region per day. Your personal breakdown is worked out on the phone when you open the app, because the server never has your allergen list to work with.
Location is read once, while you set up, and only to find the nearest forecast region. That calculation happens on the phone and the coordinates are never sent. If you would rather not share location at all, pick a country and a region from the list instead. There is no account and no sign-in, because the server holds nothing about you that an account would protect.
Your allergen profile is saved on the phone and never uploaded. If you turn on notifications, the server stores a push token, your region code, your briefing hour and the app language, and nothing else about you. Reset my data in Settings deletes the profile and region from the phone and removes the notification subscription from the server in the same step.
Pollergo covers pollen and fine dust and nothing else. There are no UV, heat or storm warnings, no general weather and no map. It does not keep a symptom diary, score how you feel, or suggest what to take. When a source has no forecast for a day, that day stays blank; Pollergo does not fill gaps with estimates of its own.
Pollergo is a forecast tool. It does not give medical advice, diagnose allergies or recommend treatment. If pollen or air quality affects your health, talk to a pharmacist, doctor or allergist.
Pollen forecasts cover 27 regions of Germany from the German Weather Service, and London, Paris, Amsterdam, Madrid, Rome, Vienna, Zurich and Warsaw from the CAMS European forecast. Those eight cities also get fine dust (PM10 and PM2.5), as do ten US cities and eight cities in Japan, where no pollen forecast is shown.
Forecasts come from different models and use different scales, so two apps can label the same day differently. Pollergo shows the raw reading and the source on every card next to its own five-step level, so you can see what the label is based on.
No. The profile is stored on the phone, and the nearest region is worked out on the phone from your location. To fetch a forecast, the server receives only the region code.
No. It needs a connection to load your region's forecast from Pollergo's server. If a source has not updated for a day or more, the app tells you how old the forecast is.
No. There is no sign-in. Allow location once or choose a city and the forecast appears straight away; the allergen profile is optional.
No. It shows forecast levels for pollen and fine dust. It does not diagnose, track symptoms or suggest medicine. Questions about symptoms or treatment belong with a pharmacist, doctor or allergist.
Pick the channel you use.
