# IWB E vs Zollo

The clearest difference is in-app purchases: IWB E at none against Zollo's 1. IWB E also leads on iOS requirement (15.5 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Zollo sells 1 one-off in-app purchase. IWB E asks for nothing beyond the download.

IWB E ships an update weekly, Zollo every 2 weeks. The most recent releases landed on October 18, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | IWB E | Zollo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 125 MB | 8 MB |
| Requires iOS | **15.5** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [swisscharge.ch AG](https://appshunter.io/developer/1436301965) | [Jan Scheithauer](https://appshunter.io/developer/1896778950) |

## What reviewers say

### IWB E

[App page](https://appshunter.io/ios/app/iwb-e-mobility/id6751958228)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### Zollo

[App page](https://appshunter.io/ios/app/zollo-customs-calculator/id6805944769)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zollo Plus | $2.99 | one-time |


## Frequently asked questions

### Is IWB E free?

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

### Is Zollo free?

Zollo is free to download, with in-app purchases available.

### Do IWB E or Zollo have ads?

Neither IWB E nor Zollo shows ads.

### Which is updated more often, IWB E or Zollo?

IWB E ships an update weekly, and Zollo every 2 weeks. Most recently, IWB E was updated on October 18, 2026 and Zollo on October 21, 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.*