Comparison

Zero CO2 vs Bookers

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

Head to head
About

Zero CO2

This app tracks your phone's carbon footprint from data usage and helps you offset emissions by planting trees. Monitor your CO2 output and see how your reforestation efforts compensate for it, receiving certificates for each planted tree.

Highlights
  • Monitors phone carbon footprint
  • Tracks CO2 emissions from data usage
  • Compensates emissions by planting trees
  • Visualizes CO2 emissions and tree compensation
  • Provides certificates for planted trees
Features
Read full description

ZeroCO2 monitors your phone's carbon footprint and keeps track of the CO2 emissions from your device. These CO2 emissions come from the data usage of your device. All cloud-services, emails, search queries, social network activities etc, are facilitated by large Data Centers, which consume large amounts of electricity to keep your data streams flowing. Over its lifetime, an iPhone can emit up to 60 kilograms of CO2. This electricity typically does not come 100% from green sources, and therefore leads to CO2 emissions. That's equivalent to more than 300 kilometers driving in a petrol-fueled car. Do you want your phone to become CO2-neutral? Then use the app to plant trees to compensate your emissions! With its comprehensive graphs, you can easily monitor how much CO2 you emit, and how your planted trees compensate these emissions. With every planted tree, you receive a certificate that proves the authenticity and shows the location of the planted tree. Prevent climate change, and become a carbon-neutral iPhone user! Note: Trees are planted by our partner Tree-Nation, the worldwide platform to reforest the world and fight climate change. All trees planted by Tree-Nation are certified by the best in class and most renowned certification standards that exist in this field. For this, Tree-Nation works with third-party certification organizations such as VCS, Gold Standard, and Plan Vivo.

About

Bookers

Features
Read full description

Bookers – это мобильное приложение для онлайн бронирования услуг

Screenshots

Zero CO24 screens
Bookers4 screens

Verdict

The call

The clearest difference is in-app purchases: Bookers at none against Zero CO2's 1. Bookers also leads on ads (none vs shown). Zero CO2's advantage is update cadence (every 3 days vs weekly). On price, device support and iOS requirement 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. Zero CO2 sells 1 one-off in-app purchase. Bookers asks for nothing beyond the download.

UpkeepUpdate frequency

Zero CO2 ships an update every 3 days, Bookers weekly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
Zero CO2 versus Bookers: the parameters behind the verdict, then further details
ParameterZero CO2Bookers
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 days — betterWeekly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.515.0 — better
Further details — not scored
Size40 MB50 MB
Age rating12+17+
DeveloperCaramba App DevelopmentBookers: бронирование услуг

In-app purchases

1 purchases

Zero CO2

One-time1
  • Plant your tree$0.99
None

Bookers

No in-app purchases

Questions

Is Zero CO2 free?
Zero CO2 is free to download, with in-app purchases available.
Is Bookers free?
Bookers is free to download, with no in-app purchases.
Do Zero CO2 or Bookers have ads?
Zero CO2 shows ads; Bookers does not.
Which is updated more often, Zero CO2 or Bookers?
Zero CO2 ships an update every 3 days, and Bookers weekly. Most recently, Zero CO2 was updated on November 3, 2026 and Bookers on November 4, 2026.

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