Comparison

Hush City vs OpenLitterMap

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

Head to head
About

Hush City

Discover and map quiet locations worldwide to escape urban noise and find peaceful spots for relaxation, reading, or conversation. Contribute to citizen science research by recording soundscapes and sharing your findings.

Highlights
  • Discover quiet areas
  • Map quiet spots globally
  • Record soundscapes
  • Contribute to research
  • Find peaceful locations
  • Community-driven data
Features
Read full description

Hush City: the app to discover, map & evaluate quiet spots around you! This app will help you find quiet areas in your city and worldwide where you can escape the city chaos, relax, play with your kids, read a book, have peaceful conversations. Enjoy slowing down! Join the Hush City community. It is simple. • Download Hush City app • Go to one of your favourite quiet spots • Record the sound where you are in the quiet spot • Take a picture of the spot where you recorded the sound • Answer the questionnaire about this quiet spot • Share this information with your community. Or, use the app to find a quiet spot near to you. Go to it and enjoy spending some time there. With this app, you are an active part of worldwide research to map quietness in cities. Our cities have become increasingly noisier by the hour. Only in Europe, over 125 million people are affected by noise pollution from traffic every year, and apparently, quietness has become a luxury available only for a few of us. With Hush City, quietness is available for all those who appreciate it. You can learn more about the research project at www.opensourcesoundscapes.org: where citizen science meets soundscape research. * Please be aware that noise levels measured by the mobile app may not be entirely accurate, depending on which smartphones are used, weather conditions and other factors Credits The first version of the Hush City app was released in April 2017 within the framework of the project: “Beyond the Noise: Open Source Soundscapes” (2016-2018). The second version of the app was developed within the framework of the project: “Hush City Mobile Lab” (2018-2020). - Inventor and principal investigator of both the projects: Dr. Antonella Radicchi (Technical University of Berlin). - Project supervisors: Prof. Dr. Dietrich Henckel (Technical University of Berlin), M.A. Jörg Kaptain (Berlin Senate, Senate Department for the Environment, Transport and Climate Protection). - Soundscape advisor: Prof. Dr. Brigitte Schulte-Fortkamp (Technical University of Berlin). - Acoustic advisors: Dipl. Ing. Michael Jäcker-Cüppers (ALD, Technical University of Berlin), Dipl. Ing. Manuel Frost (Berlin Senate, Senate Department for the Environment, Transport and Climate Protection), Dipl. Ing. Mattia Cobianchi (Bowers & Wilkins, UK). - Software development: QUERTEX GmbH (GER) in cooperation with EdgeWorks Software, Ltd. Acknowledgments - The Hush City mobile app is derived from the concept of the HUSH EXPO app envisioned by Dr. Antonella Radicchi for the EXPO Milan 2015. Dr. Antonella Radicchi designed the HUSH EXPO mobile app’s mock-up in collaboration with Roberto Lombardo. - The project: “Beyond the Noise: Open Source Soundscapes” received funding from the IPODI-Marie Curie Fellowship – People Program (Marie Curie Actions) of the European Union’s Seventh Framework Program (FP7/2007-2013) under REA grant agreement no. 600209 (TU Berlin/IPODI). - The project: “Hush City Mobile Lab” received funding from the HEAD-Genuit Foundation.

About

OpenLitterMap

Contribute to a global database of litter and plastic pollution by taking photos and tagging them. The interactive map visualizes pollution data, allowing users to create custom tags and see live updates. Participate in a worldwide competition to collect the most data.

Highlights
  • Interactive global litter map
  • Photo tagging of pollution
  • Customizable tag creation
  • Live map updates
  • Open source data
  • Country-based data collection competition
Features
Read full description

OpenLitterMap is an open source, interactive, and accessible database of the world's litter and plastic pollution. Just take a photo and tag it with our app. Litter is the first application of this real-time data collection platform. For the last 8+ years we have been crowdsourcing data to help train the OpenLitterAI to help with detection and classification. You can extend our pre-defined list of tags with your own custom tags. Just type in whatever you want and press enter. Keep the global map open to see live updates. If you click on a notification, you will be zoomed to the data that was just recorded. Copy the URL to get a link that can send anyone to any photo. Our code & data is open and accessible. Anyone can download our data for free, and use it for any purpose. This is necessary to bring transparency and democracy to science on pollution. As you tag litter, you help your country compete at the #LitterWorldCup to see who can collect the most data. By default, all users are anonymous. However, you can make your name or username appear on the map or leaderboards and compete for a position. You can also add your social media links which will appear on each upload. Like getting upvoted, the more data you upload means the more visibility you will get! Follow us on social media to keep up to date with all of the latest updates and developments.

Screenshots

Hush City4 screens
OpenLitterMap4 screens

Verdict

The call

Hush City and OpenLitterMap both sit at 3.7 stars, but that hides the real split: 83% of OpenLitterMap's written reviews are positive against 14% of Hush City's. OpenLitterMap also leads on update cadence (every 3 weeks vs every 2 months). Hush City's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, rating, ratings volume and in-app purchases 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.7 for Hush City against 3.6 for OpenLitterMap. Both are backed by a comparable volume of ratings — 6 and 9 respectively. Written reviews are what separate them: 14% of Hush City's written reviews are positive against 83% of OpenLitterMap's.

UpkeepUpdate frequency

Hush City ships an update every 2 months, OpenLitterMap every 3 weeks. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
Hush City versus OpenLitterMap: the parameters behind the verdict, then further details
ParameterHush CityOpenLitterMap
PriceFreeFree
Rating3.7 (6 ratings) — better3.6 (9 ratings)
Positive reviews14.3% of reviews83.3% of reviews — better
Number of ratings69 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size41 MB47 MB
Age rating4+12+
DeveloperAntonella RadicchiSean Lynch

Customer experience

Hush City

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews14 reviews
Positive14.3%
Neutral0.0%
Negative85.7%

OpenLitterMap

All ratings9 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

Hush City

No in-app purchases

None

OpenLitterMap

No in-app purchases

Questions

Is Hush City free?
Hush City is free to download, with no in-app purchases.
Is OpenLitterMap free?
OpenLitterMap is free to download, with no in-app purchases.
Which has better reviews, Hush City or OpenLitterMap?
Hush City is rated higher. Hush City averages 3.7 out of 5 from 6 ratings, while OpenLitterMap averages 3.6 from 9 ratings.
Do Hush City or OpenLitterMap have ads?
OpenLitterMap shows ads; Hush City does not.
Which is updated more often, Hush City or OpenLitterMap?
Hush City ships an update every 2 months, and OpenLitterMap every 3 weeks. Most recently, Hush City was updated on October 3, 2026 and OpenLitterMap on October 12, 2026.

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