Comparison

iNaturalist Classic vs OpenLitterMap

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

Head to head
About

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.

Highlights
  • Identify species globally
  • Record species sightings
  • Contribute observations to science
  • Add observations to projects
  • Learn about biodiversity
  • Connect with nature enthusiasts
Features
Read full description

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.

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

iNaturalist Classic2 screens
OpenLitterMap4 screens

Verdict

The call

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

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

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
iNaturalist Classic versus OpenLitterMap: the parameters behind the verdict, then further details
ParameteriNaturalist ClassicOpenLitterMap
PriceFreeFree
Rating4.6 (4.7K ratings) — better3.6 (9 ratings)
Positive reviews81.6% of reviews83.3% of reviews — better
Number of ratings4.7K — better9
Update frequencyEvery 5 weeksEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size44 MB47 MB
Age rating4+12+
DeveloperiNaturalistSean Lynch

Customer experience

iNaturalist Classic

All ratings4,707 ratings
Positive89.1%
Neutral3.2%
Negative7.6%
Written reviews1,000 reviews
Positive81.6%
Neutral5.5%
Negative12.9%

OpenLitterMap

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

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

None

iNaturalist Classic

No in-app purchases

None

OpenLitterMap

No in-app purchases

Questions

Is iNaturalist Classic free?
iNaturalist Classic 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, iNaturalist Classic or OpenLitterMap?
iNaturalist Classic is rated higher. iNaturalist Classic averages 4.6 out of 5 from 4.7K ratings, while OpenLitterMap averages 3.6 from 9 ratings.
Do iNaturalist Classic or OpenLitterMap have ads?
OpenLitterMap shows ads; iNaturalist Classic does not.
Which is updated more often, iNaturalist Classic or OpenLitterMap?
iNaturalist Classic ships an update every 5 weeks, and OpenLitterMap every 3 weeks. Most recently, iNaturalist Classic was updated on October 28, 2026 and OpenLitterMap on October 24, 2026.

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