Comparison

OpenLitterMap vs Gradescope

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

Gradescope

Easily upload assignments for courses using this app. Submit files from your device or scan your work directly. Assign pages for variable-length assignments and resubmit if needed before the deadline.

Highlights
  • Upload assignments
  • Scan documents with camera
  • Select existing files
  • Assign pages for variable-length assignments
  • Resubmit assignments
  • View submitted and graded assignments
Features
Read full description

Students, upload your assignments to Gradescope more easily than ever before! If your instructor uses Gradescope for your assignments, you can now upload your submission with our mobile app. After installing and opening the app, login to see your Gradescope courses and assignments. To upload a submission, click on the assignment in the “Not Submitted” tab and either “Select File” to select an existing file from your device or “Scan” all pages of your completed work using your iPhone’s camera. Once you submit your file(s), for templated assignments, you’re all set. For variable-length assignments, “Assign pages” to indicate where your answer for each question appears within your submission. It’s that easy! After confirming, your assignment then moves to the “Submitted” tab. If needed, you can resubmit your assignment until the due date your instructor set has passed. Once it is graded and grades are published for the assignment, it then moves to the “Graded” tab. Note: For V1 of the app, you will be directed to our mobile website for any advanced functionality, including viewing feedback and submitting timed, programming, or online assignments. Stay tuned for future updates that will allow you to do even more with our mobile app!

Screenshots

OpenLitterMap4 screens
Gradescope4 screens

Verdict

The call

The clearest difference is review sentiment: OpenLitterMap at 83% against Gradescope's 9%. OpenLitterMap also leads on rating (3.6 vs 1.4) and update cadence (every 3 weeks vs every 2 months). Gradescope's advantage is ads (none vs shown) and ratings volume (275 vs 9). On price, 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 1.4. That said, the two scores are not equally well evidenced: Gradescope has 275 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 83% of OpenLitterMap's written reviews are positive against 9% of Gradescope's.

UpkeepUpdate frequency

OpenLitterMap ships an update every 3 weeks, Gradescope every 2 months. Both last shipped on November 3, 2026.

Scorecard7 real differences · 3 level
OpenLitterMap versus Gradescope: the parameters behind the verdict, then further details
ParameterOpenLitterMapGradescope
PriceFreeFree
Rating3.6 (9 ratings) — better1.4 (275 ratings)
Positive reviews83.3% of reviews — better8.7% of reviews
Number of ratings9275 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.013.4 — better
Further details — not scored
Size47 MB37 MB
Age rating12+4+
DeveloperSean LynchTurnitin

Customer experience

OpenLitterMap

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

Gradescope

All ratings259 ratings
Positive7.3%
Neutral3.5%
Negative89.2%
Written reviews104 reviews
Positive8.7%
Neutral6.7%
Negative84.6%

Bugs and requests

OpenLitterMap

Not enough reviews yet to summarise bugs or requests.

Gradescope

Reported bugs

3 issues
  • Camera flash issues during scanning
  • Photos not uploading in correct order
  • Inconsistent download button behavior

Requested features

3 requests
  • Ability to sort assignments by due date
  • Integration of tools for instructors
  • Improved iPad and tablet optimization

In-app purchases

None

OpenLitterMap

No in-app purchases

None

Gradescope

No in-app purchases

Questions

Is OpenLitterMap free?
OpenLitterMap is free to download, with no in-app purchases.
Is Gradescope free?
Gradescope is free to download, with no in-app purchases.
Which has better reviews, OpenLitterMap or Gradescope?
OpenLitterMap is rated higher. OpenLitterMap averages 3.6 out of 5 from 9 ratings, while Gradescope averages 1.4 from 275 ratings.
Do OpenLitterMap or Gradescope have ads?
OpenLitterMap shows ads; Gradescope does not.
Which is updated more often, OpenLitterMap or Gradescope?
OpenLitterMap ships an update every 3 weeks, and Gradescope every 2 months. Most recently, OpenLitterMap was updated on November 3, 2026 and Gradescope on November 3, 2026.

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