# SIAWISE vs Keyinvoice App

The clearest difference is update cadence: Keyinvoice App at every 6 weeks against SIAWISE's every 9 months. On price, ads, 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.

SIAWISE ships an update every 9 months, Keyinvoice App every 6 weeks. The most recent releases landed on September 11, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | SIAWISE | Keyinvoice App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Size | 27 MB | 14 MB |
| Requires iOS | 15.0 | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SIA - Sociedade de Inovacao Ambiental, Lda.](https://appshunter.io/developer/914043079) | [T & T-TELEMATICA E TECNOLOGIAS DE INFORMACAO, UNIPESSOAL, LDA](https://appshunter.io/developer/1523497190) |

## What reviewers say

### SIAWISE

[App page](https://appshunter.io/ios/app/siawise/id914043076)

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

**In-app purchases:** none


### Keyinvoice App

[App page](https://appshunter.io/ios/app/keyinvoice-app/id981507076)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SIAWISE free?

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

### Is Keyinvoice App free?

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

### Do SIAWISE or Keyinvoice App have ads?

Neither SIAWISE nor Keyinvoice App shows ads.

### Which is updated more often, SIAWISE or Keyinvoice App?

SIAWISE ships an update every 9 months, and Keyinvoice App every 6 weeks. Most recently, SIAWISE was updated on September 11, 2026 and Keyinvoice App on September 9, 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.*