# ZeroFootprint vs BoomiCAJ

The clearest difference is ads: ZeroFootprint at none against BoomiCAJ's shown. BoomiCAJ's advantage is update cadence (every 2 months vs every 7 months) and iOS requirement (12.4 vs 16.6). On price, 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.

ZeroFootprint ships an update every 7 months, BoomiCAJ every 2 months. The most recent releases landed on October 12, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ZeroFootprint | BoomiCAJ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 97 MB | 93 MB |
| Requires iOS | 16.6 | **12.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Rocknetz Systems Private Limited](https://appshunter.io/developer/1698128502) | [SFA SUSTAINABILITY SOLUTIONS SDN BHD](https://appshunter.io/developer/1723184402) |

## What reviewers say

### ZeroFootprint

[App page](https://appshunter.io/ios/app/zerofootprint/id6449023899)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### BoomiCAJ

[App page](https://appshunter.io/ios/app/boomicaj/id6475045158)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is ZeroFootprint free?

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

### Is BoomiCAJ free?

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

### Do ZeroFootprint or BoomiCAJ have ads?

BoomiCAJ shows ads; ZeroFootprint does not.

### Which is updated more often, ZeroFootprint or BoomiCAJ?

ZeroFootprint ships an update every 7 months, and BoomiCAJ every 2 months. Most recently, ZeroFootprint was updated on October 12, 2026 and BoomiCAJ on October 27, 2026.

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