# aiwan 3+3 Postal Code vs Slimca

The clearest difference is ads: Slimca at none against aiwan 3+3 Postal Code's shown. Slimca also leads on update cadence (every 2 months vs every 37 months). aiwan 3+3 Postal Code's advantage is iOS requirement (13.0 vs 15.6). 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.

aiwan 3+3 Postal Code ships an update every 37 months, Slimca every 2 months. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | aiwan 3+3 Postal Code | Slimca |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 37 months | **Every 2 months** |
| Size | 28 MB | 18 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chengchung Chiu](https://appshunter.io/developer/1359094944) | [ARTIFICIAL INTELLIGENCE CO., LTD.](https://appshunter.io/developer/1388898317) |

## What reviewers say

### aiwan 3+3 Postal Code

[App page](https://appshunter.io/ios/app/aiwan-3-plus-3-postal-code/id1524433635)

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

**In-app purchases:** none


### Slimca

[App page](https://appshunter.io/ios/app/slimca/id1601789044)

**In-app purchases:** none


## Frequently asked questions

### Is aiwan 3+3 Postal Code free?

aiwan 3+3 Postal Code is free to download, with no in-app purchases.

### Is Slimca free?

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

### Do aiwan 3+3 Postal Code or Slimca have ads?

aiwan 3+3 Postal Code shows ads; Slimca does not.

### Which is updated more often, aiwan 3+3 Postal Code or Slimca?

aiwan 3+3 Postal Code ships an update every 37 months, and Slimca every 2 months. Most recently, aiwan 3+3 Postal Code was updated on September 8, 2026 and Slimca on September 10, 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.*