Comparison

Red Button App vs zero

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

Head to head
About

Red Button App

Features
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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 youโ€™ve had and filter by activity name. Push Notifications - The Red Button app will automatically send push notifications to your and your contacts phone.

About

zero

Features
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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

Red Button App4 screens
zero3 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

ScorecardNo meaningful differences
Red Button App versus zero: the parameters behind the verdict, then further details
ParameterRed Button Appzero
PriceFreeFree
Update frequencyEvery 2 months โ€” betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0.013.4 โ€” better
Further details โ€” not scored
Size71 MB34 MB
Age rating4+4+
DeveloperPVC Digital DesignsCole Stites-Clayton

In-app purchases

None

Red Button App

No in-app purchases

None

zero

No in-app purchases

Questions

Is Red Button App free?
Red Button App is free to download, with no in-app purchases.
Is zero free?
zero is free to download, with no in-app purchases.
Do Red Button App or zero have ads?
Neither Red Button App nor zero shows ads.
Which is updated more often, Red Button App or zero?
Red Button App ships an update every 2 months, and zero every 4 months. Most recently, Red Button App was updated on September 19, 2026 and zero on September 14, 2026.

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