Red Button App vs zero
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Red Button App
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The Red Button application is all about doing your favorite activity, letting your loved ones know that your safe and keeping a record of it. Hike up a mountain, fly down, ride your mountain bike, cruise with your snowboard, or drive to where you need to be - track and report on your safe arrival. Custom Activities - Create your own custom activities, each with their own time limit & tracking speed, or add any of the predefined activities. Route Tracking - You can now track and record your activity route and look back at any activity to see any details and see the route. Emergency Contacts - Add and connect with your chosen users on the app to use as emergency contacts. Just get your mom to install the app! SOS Button - During any activity, if anything goes wrong, you have the ability to press the SOS button and alert your emergency contact that you need help. Medical Card - Add your medical aid details, policy number and allergies. This all help fills your medical card that can be shown to rescuers. Activity Records - Your activities are all recorded and saved in the records section. Look back at the fun youโve had and filter by activity name. Push Notifications - The Red Button app will automatically send push notifications to your and your contacts phone.
zero
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Anxious about climate change? Want to take action to manage your climate impact? Talk to zero. zero is an AI agent built to help you understand, reduce, and offset your climate impact. By estimating the carbon emissions associated with your activities and providing an extremely easy way to purchase vetted, high-quality carbon offsets, zero is here to be your trusted agent for climate action. Talk to zero. Protect the planet.
Screenshots
Verdict
Red Button App and zero are too close to call on the numbers: across 6 compared parameters โ price, update cadence, ads and in-app purchases among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Red Button App ships an update every 2 months, zero every 4 months. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.
| Parameter | Red Button App | zero |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months โ better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0.0 | 13.4 โ better |
| Further details โ not scored | ||
| Size | 71 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | PVC Digital Designs | Cole Stites-Clayton |
In-app purchases
Red Button App
No in-app purchases
zero
No in-app purchases









