Comparison

swrm vs GreenTrax

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

Head to head
About

swrm

Track your carbon footprint and adopt a more sustainable lifestyle. This app offers a comprehensive calculator, educational resources, and community challenges to help you reduce your environmental impact. Monitor groceries, transportation, and household energy use.

Highlights
  • Carbon footprint calculator
  • Grocery barcode scanning
  • Vehicle and transportation tracking
  • Household appliance impact
  • Community challenges
  • Educational articles and videos
Features
Read full description

swrm will enable you to transition to a more sustainable lifestyle. Track your carbon footprint and take up the challenge to live sustainably. This is the most comprehensive carbon footprint calculator ever developed - to equip you with the data you need to be your most sustainable self! Including educational videos & articles to support you in this transition. Discover and track the carbon footprint from the grocery products you purchase and compare your favorite brands to find out which are better for the planet. We have added perishables so you can track purchases of your fresh produce and goods from agriculture. Track the carbon footprint from driving your vehicle or by taking a shared transportation alternative, such as a bus or train. Add your personal devices and home appliances to see how they affect your household carbon footprint. Create your own hive to challenge your friends to live sustainably and save the planet as a community! With three difficulty levels, you can adjust your goals as your green knowledge grows to try and reach a completely sustainable lifestyle. Our App includes: • Grocery barcode scanning • Grocery store location for improved data accuracy • Compare life-cycle energy consumption of products • Vehicle search by make and model • Tracking of vehicle carbon footprint by the miles you drive • Tracking of other transportation methods: Walking, Cycling, Train, Subway, Bus and Taxi Services • Add the distance or duration of travel and check the footprint before you hit the road • Compare your carbon footprint to other members in your community or friends across the globe. • Relevant and up-to-date articles and videos on sustainability, current environmental events and issues, and the latest on reducing your carbon footprint. swrm is a community with team members across the globe who are passionate about making a difference to the environment and helping to solve the climate issues we face today. We love to partner with like-minded people who share this enthusiasm for our planet! Join the swrm Find out more: greenswrm.com Follow us on socials: instagram.com/greenswrm; facebook.com/GSwrm; twitter.com/greenswrm Buzz us with feedback: feedback@greenswrm.com

About

GreenTrax

This app records your human-powered journeys, calculating your carbon footprint reduction. It visualizes your progress with charts and savings equivalents, and can import commute data from Strava.

Highlights
  • Tracks human-powered commutes
  • Calculates carbon savings
  • Displays savings equivalencies
  • Visualizes data with charts
  • Strava read-only import
Read full description

GreenTrax tracks human-powered commuting. By adding commute activities, the app tracks your commutes over time periods and displays carbon savings with helpful charts and savings equivalencies. The app is compatible with Strava allowing read-only import of your entire commute type Strava activities.

Screenshots

swrm4 screens
GreenTrax4 screens

Verdict

The call

The clearest difference is rating: GreenTrax at 5.0 against swrm's 4.3. GreenTrax also leads on update cadence (every 5 weeks vs every 9 months). swrm's advantage is in-app purchases (none vs 4) and ratings volume (6 vs 1). On price, ads 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. GreenTrax sells 4 one-off in-app purchases. swrm asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GreenTrax holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: swrm has 6 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

swrm ships an update every 9 months, GreenTrax every 5 weeks. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
swrm versus GreenTrax: the parameters behind the verdict, then further details
ParameterswrmGreenTrax
PriceFreeFree
Rating4.3 (6 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings6 — better1
Update frequencyEvery 9 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS10.0 — better18.0
Further details — not scored
Size124 MB2 MB
Age rating4+4+
DeveloperGreenswrm, Inc.Brian Buck

Customer experience

swrm

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

GreenTrax

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

swrm

No in-app purchases

4 purchases

GreenTrax

One-time4
  • Nice Donation$0.99
  • Big Donation$4.99
  • Generous Donation$9.99
Show 1 more
  • Supporter Donation$19.99

Questions

Is swrm free?
swrm is free to download, with no in-app purchases.
Is GreenTrax free?
GreenTrax is free to download, with in-app purchases available.
Which has better reviews, swrm or GreenTrax?
GreenTrax is rated higher. swrm averages 4.3 out of 5 from 6 ratings, while GreenTrax averages 5.0 from 1 ratings.
Do swrm or GreenTrax have ads?
Neither swrm nor GreenTrax shows ads.
Which is updated more often, swrm or GreenTrax?
swrm ships an update every 9 months, and GreenTrax every 5 weeks. Most recently, swrm was updated on October 12, 2026 and GreenTrax on October 13, 2026.

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