Sustainers
It all adds up
Free · Designed for iPad. Not verified for macOS.
Finished a challenge? You now get a certificate with your name, your medal and your results. Share it with colleagues or straight to LinkedIn.
Sustainers turns sustainability into a team sport. Take on simple, everyday challenges — eat less meat, cycle to work, take shorter showers — and
watch your real CO2 and money savings add up.
Built for companies and their employees, Sustainers makes lasting behavior change easy, social, and rewarding.
WHAT YOU CAN DO
• Pick from challenges and activities chosen by your company
• Check in daily and log what you complete
• See your estimated CO2 and euro savings grow over time
• Track your progress and weekly streaks
• Compete with colleagues on a team leaderboard
• Earn rewards for the most CO2 saved
WHY SUSTAINERS
• Real impact — every action is translated into measurable CO2 and cost savings
• Better together — teams motivate each other and celebrate progress
• Simple — small daily steps that fit into your routine, no guilt required
Whether you're shrinking your carbon footprint or saving on your bills, Sustainers helps you and your colleagues make a difference that adds up.
Sustainers is offered through participating employers. You'll need an account from your organization to sign in.
more • A new certificate to be proud of: your medal shines, your name is on it, and your days and check-ins count up.
• Every certificate has its own number and seal. Download it, share the link or post it straight to LinkedIn.
• Reached gold? We now always check whether your habit is still going like it was at silver. One tap is enough.
• The first time you open a certificate, we celebrate with confetti. Once, not twice.
1.0.50 5h ago
• Earned silver or gold? We ask whether your habit is becoming second nature, and at gold how often you do it now. One tap is all it takes.
• Every kind of saving now has its own colour: money gold, CO₂ blue, waste camel, time purple and health red.
• Your leaderboard position and your points sit in a fresh white card, with a few small surprises.
1.0.48 23h ago
• No account yet? Sign in with your work email. If your organisation takes part, you can create your account right in the app.
• After checking in, your points fly to the leaderboard, so you see your contribution straight away.
• The plus and minus buttons and the slider when checking in feel much livelier. Hold + to count up quickly.
1.0.47 2d ago
• After checking in, your points fly up to the leaderboard, so you see right away where your score goes.
• The plus, minus and slider controls when checking in feel much livelier now. Hold + to count up quickly.
1.0.46 2d ago
- Wrapping up a challenge is quicker: everything you need is on one page. Pick a tree, a bush or a seedling to say whether it became a habit.
- The check-in slider feels better: clear feedback once you've slid far enough, and a celebration when you confirm.
- A finished challenge you've started again can now be wrapped up right from your check-ins.
1.0.45 6d ago
You can now wrap up a finished challenge right from the check-in screen, even when you've already started it again. Answer the wrap-up question and view your certificate while your new run keeps going. Plus small improvements and fixes.
1.0.44 Oct 22
• New: your check-in streak gets a celebration. When your streak grows, watch the counter go up.
• Finished challenges now stay with your check-ins for two weeks. Wrap them up right there and view your certificate.
• See your medals on every challenge: earned medals in colour, the next one already waiting in grey.
• Wrapping up a challenge is simpler: the question whether it became a habit is now front and centre.
1.0.43 Oct 21
- New: a welcome screen when you first open the app. It explains step by step how to sign in: with the password from your welcome email, or with a one-time code by email.
- Signing in after installing is smoother. The app only asks to paste when a sign-in link is actually waiting.
- Tap "How do I sign in?" on the login screen to see the steps again.
- Small improvements and bug fixes.
1.0.42 Oct 17
- Challenges can now have their own video, shown as soon as you open the challenge.
- Medals and points now count each time you claim your impact, even when you fill in several options at once. Medals you've already earned stay.
- A cleaner leaderboard: clearer toggles and the full score in the top 3.
- Small improvements and bug fixes.
1.0.41 Oct 16
• Choose your own password: new members pick a password they'll remember right after signing in for the first time.
• Clearer leaderboard: scores that look equal now show an extra decimal. In a real tie, whoever got there first ranks higher, and you can see who you're tied with.
• Finished a challenge? "Continue" is now the default; you can still extend.
• No more "app icon changed" alert.
• Switch between screens quickly without false error messages.
• If Sustainers is briefly unavailable, the app keeps retrying by itself.
1.0.40 Oct 12
What's new
- A brand-new leaderboard: see your position at a glance, how much you need to overtake the next person, and how you moved this week. The top 3 now stand on a podium, and your own row stays in view.
- Challenge goals: the Goal tab shows your team's goal for each challenge, with progress so far and how much is left to go.
- See your points: after a check-in you see what you earned and your total for the week.
- A fresh look: colourful new icons in the tab bar and larger, easier-to-read text on activity cards.
- Kickoff videos can now be skipped.
- Clearer help when something's wrong: no internet, a network that blocks Sustainers, or a temporary problem on our side. The app explains what's going on and reloads by itself.
- Small fixes and improvements.
1.0.39 Oct 10
Kickoff videos
If your team lead posted a welcome video, it now plays when you open
the app — once, then it's out of your way for good.
Don't feel like swiping? Just hold
The claim button still swipes, but you can now press and hold it
anywhere and it slides across by itself.
Your progress shows up straight away
Check in or claim an activity and the leaderboard and your streak both
update on the spot. No pulling to refresh, no wondering whether it
registered.
Honest medals
The finish screen no longer awards bronze for a run that fell short of
it. Didn't quite make it? You'll see exactly how many check-ins you
still need for your first medal, and you can extend the challenge to
get there.
Getting back in
If the app ever loses access to your account, it now quietly sorts
itself out in the background. When it can't, every screen offers a
"Sign in again" button instead of a retry that goes nowhere.
Plus a Dutch wording fix on the challenge finish screen.
1.0.33 Oct 2
Kickoff videos
If your team lead posted a welcome video, it now plays when you open
the app — once, then it's out of your way for good.
Your check-in counts straight away
Check in and the leaderboard reflects it immediately. No more pulling
to refresh and wondering whether it registered.
Honest medals
The finish screen no longer awards bronze for a run that fell short of
it. Didn't quite make it? You'll see exactly how many check-ins you
still need for your first medal, and you can extend the challenge to
get there.
Getting back in
If the app ever loses access to your account, it now quietly sorts
itself out in the background. When it can't, every screen offers a
"Sign in again" button instead of a retry that goes nowhere.
Plus a Dutch wording fix on the challenge finish screen.
1.0.32 Sep 30
Kickoff videos
If your team lead posted a welcome video, it now plays when you open
the app — once, then it's out of your way for good.
Honest medals
The finish screen no longer awards bronze for a run that fell short of
it. Didn't quite make it? You'll see exactly how many check-ins you
still need for your first medal, and you can extend the challenge to
get there.
Getting back in
If the app ever loses access to your account, it now quietly sorts
itself out in the background. When it can't, every screen offers a
"Sign in again" button instead of a retry that goes nowhere.
Plus a Dutch wording fix on the challenge finish screen.
1.0.31 Sep 24
Kickoff videos are here!
• Team leads and ESG managers can now record or upload a short kickoff video — straight from the camera or your library — to introduce a challenge and welcome the team.
• Choose who sees each video: everyone in your organisation, or just a specific team.
• New members get a warm welcome: targeted videos now play automatically the first time they open the app, before they pick a challenge.
• Find and manage your team's videos from your profile — tap to play, hold to remove.
Plus performance improvements and bug fixes to make everything smoother.
1.0.30 Sep 21
Your streak comes alive.
Your check-in streak now reacts the moment you check in - the flame lights up and your day count ticks up instantly, no waiting or refresh. And every time your streak grows, the flame gives a little celebratory bounce.
Plus small performance and reliability improvements.
1.0.29 Sep 12
Introducing streaks!
- Build a check-in streak — check in on weekdays and watch your flame grow. Weekends are a bonus: a weekend check-in adds to your streak, but skipping one never breaks it.
- See your streak at a glance in Check-ins, on the home-screen widget, and even on the app icon while you're on a roll.
- Friendly reminders so you don't lose your streak.
- Climb-the-leaderboard celebration when a check-in moves you up.
- Sharper CO₂ figures and the usual polish and performance improvements.
Thanks for saving with us - keep the streak going!
1.0.28 Aug 17
Climbing the leaderboard just got more rewarding.
• Move-up celebration — check in and watch a little celebration when you climb your weekly leaderboard. A nudge to keep the friendly competition going.
• Sharper savings — small CO₂ amounts now show with more precision on the leaderboard, so every bit of progress counts.
• Polish and performance improvements throughout.
Thanks for saving with us. Keep those check-ins coming!
1.0.27 Aug 13
• Complete a challenge and your certificate now sits front and centre — the medal you earned is the first thing you see, no scrolling.
• Reward reveals keep getting smoother, with cleaner numbers.
• Behind-the-scenes polish and fixes.
1.0.24 Jul 28
Celebrate every win.
• New: check-ins now pop a playful loot-box reveal — your savings burst out and count up in a shower of confetti.
• Tick off a whole week of days and we'll tally them into one big celebration.
• Small savings now show real precision instead of rounding down to zero.
• Polish and fixes throughout.
1.0.23 Jul 25
Sustainers turns everyday sustainable choices at work into real, measurable impact.
Pick challenges your company offers, check in on your habits, and watch your savings grow — not just CO₂, but money saved, waste avoided, time gained, and points for your health. Every claim is a small celebration of the difference you're making.
WHY YOU'LL LOVE IT
- See your real impact across every metric your company tracks
- Simple daily check-ins that take seconds
- Earn medals as you build streaks - bronze, silver, gold
- Climb the leaderboard and compete with your team
- Prizes for the biggest savers
Sustainers is offered through your employer. Sign in with your work account to get started.
Small habits, real change.
A few notes:
- Release notes lead with the new multi-KPI reveal (the visible feature) and honestly name the bug fix without over-explaining.
- The waste/time/health lines are hedged with "where your company tracks them" since those KPIs are per-customer toggles - most tenants only have money and CO₂ on, so you don't want to promise metrics a given user won't see.
- Want me to trim the release notes to a shorter single-paragraph version, or draft a Google Play "What's New" variant (500-char limit) to match?
1.0.22 Jul 24
• Getting started is faster — install from your welcome email and you're signed straight in, no code to type.
• Admins can now open the admin area right from their profile.
• The "you just saved" celebration now stays centered on screen, plus polish and fixes across check-ins, the leaderboard and your profile.
1.0.19 Jul 17
• Stop a challenge you’ve started — with a quick confirmation.
• Tap a challenge’s title or image on the check-in screen to jump straight to its details.
• Admins can now open the admin area right from their profile.
• Leaderboard teams are ranked by average CO₂ per member (fairer for smaller teams) and now show the team total too.
• Smoother leaderboard animations, clearer impact numbers, and other polish and fixes.
1.0.16 Jul 16
• New: a guided welcome when you first sign in — pick your first challenge, choose your notification preferences, and optionally set a password, then jump straight into your first check-in.
• Challenge cards look cleaner — no more empty gaps above and below the artwork on longer titles.
• Various polish and fixes.
1.0.15 Jul 15
• You can now set or change your password right from your profile.
• Switching the app language takes effect instantly — no restart needed.
• Polished the challenges list and various small fixes and improvements.
1.0.14 Jul 11
• A new certificate to be proud of: your medal shines, your name is on it, and your days and check-ins count up.
• Every certificate has its own number and seal. Download it, share the link or post it straight to LinkedIn.
• Reached gold? We now always check whether your habit is still going like it was at silver. One tap is enough.
• The first time you open a certificate, we celebrate with confetti. Once, not twice.
more Version 1.0.50 5h ago
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