iNaturalist Classic vs OpenLitterMap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iNaturalist Classic
Record and identify species encounters with a simple interface. Contribute to scientific research and learn about biodiversity. Connect with other nature enthusiasts and explore the natural world.
- Identify species globally
- Record species sightings
- Contribute observations to science
- Add observations to projects
- Learn about biodiversity
- Connect with nature enthusiasts
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iNaturalist Classic is the original version of our app. For the best experience, including many new features and ongoing updates, we recommend using the new, redesigned iNaturalist app. iNaturalist Classic offers a simple interface to record encounters with biodiversity for people who are already familiar with iNaturalist. KEY FEATURES • Identify species from anywhere in the world (while online) • Keep a record of species you see • Contribute to science by sharing your observations • Add your observations manually to projects • Learn about biodiversity • Connect with and learn from other nature enthusiasts iNaturalist’s nonprofit mission is to connect people to nature and advance science and conservation. iNaturalist is freely available thanks to generous support from our community of donors. Explore and learn even more at https://www.inaturalist.org.
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.
- Interactive global litter map
- Photo tagging of pollution
- Customizable tag creation
- Live map updates
- Open source data
- Country-based data collection competition
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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
Verdict
The clearest difference is rating: iNaturalist Classic at 4.6 against OpenLitterMap's 3.6. iNaturalist Classic also leads on ads (none vs shown) and ratings volume (4.7K vs 9). On price, review sentiment, update cadence 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iNaturalist Classic holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: iNaturalist Classic has 4.7K ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 82% of iNaturalist Classic's written reviews are positive against 83% of OpenLitterMap's, so the app with the better star average is not the one people write more warmly about.
iNaturalist Classic ships an update every 5 weeks, OpenLitterMap every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | iNaturalist Classic | OpenLitterMap |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (4.7K ratings) — better | 3.6 (9 ratings) |
| Positive reviews | 81.6% of reviews | 83.3% of reviews — better |
| Number of ratings | 4.7K — better | 9 |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 44 MB | 47 MB |
| Age rating | 4+ | 12+ |
| Developer | iNaturalist | Sean Lynch |
Customer experience
iNaturalist Classic
OpenLitterMap
Bugs and requests
iNaturalist Classic
Reported bugs
3 issues- Login issues or inability to create account
- Slow upload speeds or observation syncing
- Inconsistent performance between mobile and web versions
Requested features
5 requests- Ability to follow other users and see their observations
- More filtering and sorting options for observations
- Offline mode for taking photos and uploading later
- Easier location input for observations
- Private/personal project functionality
OpenLitterMap
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iNaturalist Classic
No in-app purchases
OpenLitterMap
No in-app purchases
Questions
Is iNaturalist Classic free?
Is OpenLitterMap free?
Which has better reviews, iNaturalist Classic or OpenLitterMap?
Do iNaturalist Classic or OpenLitterMap have ads?
Which is updated more often, iNaturalist Classic or OpenLitterMap?
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