Comparison

OpenLitterMap vs Yellowdig

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

Head to head
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.

About

Yellowdig

Engage in vibrant community discussions and share content seamlessly. This app provides real-time notifications and flexible content sharing for learners, facilitators, and administrators. Experience meaningful engagement on the go.

Highlights
  • Vibrant conversations
  • Real-time notifications
  • Flexible content sharing
  • Seamless community interactions
  • Mobile engagement
Features
Read full description

Discover a new way to stay connected and engaged with Yellowdig Conversations! Perfect for learners, facilitators, and administrators, this app lets you dive into vibrant conversations, receive real-time notifications, and share content from anywhere. Built to offer seamless community interactions and flexible content sharing on mobile, Yellowdig Conversations brings powerful, meaningful engagement to your fingertips.

Screenshots

OpenLitterMap4 screens
Yellowdig3 screens

Verdict

The call

The clearest difference is review sentiment: OpenLitterMap at 83% against Yellowdig's 26%. OpenLitterMap also leads on rating (3.6 vs 2.7). Yellowdig's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, 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.

ReceptionRating · Positive reviews · Number of ratings

OpenLitterMap holds the better App Store score, 3.6 against 2.7. Both are backed by a comparable volume of ratings — 9 and 34 respectively. Written reviews point the same way: 83% of OpenLitterMap's written reviews are positive against 26% of Yellowdig's.

UpkeepUpdate frequency

OpenLitterMap ships an update every 3 weeks, Yellowdig every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
OpenLitterMap versus Yellowdig: the parameters behind the verdict, then further details
ParameterOpenLitterMapYellowdig
PriceFreeFree
Rating3.6 (9 ratings) — better2.7 (34 ratings)
Positive reviews83.3% of reviews — better26.3% of reviews
Number of ratings934 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size47 MB82 MB
Age rating12+17+
DeveloperSean LynchYellowdig

Customer experience

OpenLitterMap

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

Yellowdig

All ratings32 ratings
Positive40.6%
Neutral3.1%
Negative56.3%
Written reviews19 reviews
Positive26.3%
Neutral5.3%
Negative68.4%

In-app purchases

None

OpenLitterMap

No in-app purchases

None

Yellowdig

No in-app purchases

Questions

Is OpenLitterMap free?
OpenLitterMap is free to download, with no in-app purchases.
Is Yellowdig free?
Yellowdig is free to download, with no in-app purchases.
Which has better reviews, OpenLitterMap or Yellowdig?
OpenLitterMap is rated higher. OpenLitterMap averages 3.6 out of 5 from 9 ratings, while Yellowdig averages 2.7 from 34 ratings.
Do OpenLitterMap or Yellowdig have ads?
OpenLitterMap shows ads; Yellowdig does not.
Which is updated more often, OpenLitterMap or Yellowdig?
OpenLitterMap ships an update every 3 weeks, and Yellowdig every 2 weeks. Most recently, OpenLitterMap was updated on November 3, 2026 and Yellowdig on November 4, 2026.

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