Comparison

Nasapp vs Harmonie

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

Nasapp

Features

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NASAPP is a sophisticated but easy to use and interpret tool developed by the EURECAT Technology Centre of Catalonia, based in Catalonia, Spain. The NASAPP application is free of charge and has been developed so that anyone can be informed about air quality with data from the nearest automatic remote stations that collect basic information for atmospheric monitoring (gas and particle levels). NASAPP users can also report odour episodes anywhere and anytime. These odour observations create a dynamic map of odour pollution areas, with useful information for public administrations, chemical industries, ports and all kinds of activities in order to find joint solutions that can help mitigate odour pollution. NASAPP provides structured, form-based data collection from individual citizen reports in real time. Each record includes meteorological data for the study area. In addition, these records are the point of origin for statistical studies, air dispersion modelling and back-trajectory modelling towards the source or origin of the odour.

About

Harmonie

Features

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Screenshots

Nasapp4 screens

Harmonie4 screens

Verdict

The call

The clearest difference is update cadence: Nasapp at every 5 months against Harmonie's every 26 months. Nasapp also leads on iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Nasapp ships an update every 5 months, Harmonie every 26 months. The most recent releases landed on December 13, 2025 and September 9, 2026 respectively.

Scorecard2 real differences · 4 level

Nasapp versus Harmonie: the parameters behind the verdict, then further details
Parameter	Nasapp	Harmonie
Price	Free	Free
Update frequency	Every 5 months — better	Every 26 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	11.0 — better	13.0
Further details — not scored
Size	7 MB	56 MB
Age rating	4+	4+
Developer	FUNDACIO PRIVADA CENTRE TECNOLOGIC DE LA QUIMICA DE CATALUNYA	MEDICINA ESTETICA SALAMANCA S.L

In-app purchases

None

Nasapp

No in-app purchases

None

Harmonie

No in-app purchases

Questions

Is Nasapp free?

Nasapp is free to download, with no in-app purchases.

Is Harmonie free?

Harmonie is free to download, with no in-app purchases.

Do Nasapp or Harmonie have ads?

Neither Nasapp nor Harmonie shows ads.

Which is updated more often, Nasapp or Harmonie?

Nasapp ships an update every 5 months, and Harmonie every 26 months. Most recently, Nasapp was updated on December 13, 2025 and Harmonie on September 9, 2026.