# RentZeroCO2 vs Kross Booking

The clearest difference is ads: Kross Booking at none against RentZeroCO2's shown. RentZeroCO2's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, in-app purchases and device support there is nothing between them.

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

RentZeroCO2 ships an update every 3 weeks, Kross Booking fortnightly. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | RentZeroCO2 | Kross Booking |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/kross-booking/id6453888804/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 62 MB | 65 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [RGM s.r.l.](https://appshunter.io/developer/1635919266) | [Solutions Plus srl](https://appshunter.io/developer/1168102485) |

## What reviewers say

### RentZeroCO2

[App page](https://appshunter.io/ios/app/rentzeroco2/id6447355432)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Kross Booking

[App page](https://appshunter.io/ios/app/kross-booking/id6453888804)

Manage bookings, guests, owners, and collaborators efficiently. This comprehensive software solution is designed for all types of short, medium, and long-term rental businesses, including apartments, vacation homes, hotels, and B&Bs.

**Highlights:** Booking management, Guest management, Owner management, Collaborator management, Short-term rental support, Long-term rental support

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is RentZeroCO2 free?

RentZeroCO2 is free to download, with no in-app purchases.

### Is Kross Booking free?

Kross Booking is free to download, with no in-app purchases.

### Do RentZeroCO2 or Kross Booking have ads?

RentZeroCO2 shows ads; Kross Booking does not.

### Which is updated more often, RentZeroCO2 or Kross Booking?

RentZeroCO2 ships an update every 3 weeks, and Kross Booking fortnightly. Most recently, RentZeroCO2 was updated on October 6, 2026 and Kross Booking on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*