# Si vs Checklist Inspector Pro

The clearest difference is rating: Checklist Inspector Pro at 5.0 against Si's 3.0. Si's advantage is in-app purchases (none vs 3) and iOS requirement (12 vs 26.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Checklist Inspector Pro sells 3 in-app purchases, starting at $6.95 per month. Si asks for nothing beyond the download.

Checklist Inspector Pro holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Si ships an update monthly, Checklist Inspector Pro fortnightly. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Si | Checklist Inspector Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/si-ca-mobileapp/id1471645951/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/checklist-inspector-pro/id1502014524/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 94 MB | 76 MB |
| Requires iOS | **12** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SAUERMANN INDUSTRIE](https://appshunter.io/developer/1169513729) | [Veam Studios Ltd](https://appshunter.io/developer/410336935) |

## What reviewers say

### Si

[App page](https://appshunter.io/ios/app/si-ca-mobileapp/id1471645951)

Remotely control and interact with specific combustion gas analyzers via Bluetooth. View real-time data, save measurements, and generate reports in various formats directly from your mobile device.

**Highlights:** Bluetooth connectivity, Real-time data viewing, Save measurements, Generate reports (CSV, PDF, XML), Email reports, Remote control

**In-app purchases:** none


### Checklist Inspector Pro

[App page](https://appshunter.io/ios/app/checklist-inspector-pro/id1502014524)

Streamline inspections and audits with customizable reports. Document findings, add photos, assign actions, and collect signatures. Adaptable for various industries to improve efficiency and professionalism.

**Highlights:** Create detailed inspections with categories and items, Add various test types and questions, Capture and annotate photos, Assign actions with priorities and due dates, Customize reports with branding, Collect electronic signatures, Export professional PDF reports

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Monthly | $6.95 | per month |
| Cloud 6 Monthly | $39.99 | per 6 months |
| Cloud Yearly | $49.99 | per year |


## Frequently asked questions

### Is Si free?

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

### Is Checklist Inspector Pro free?

Checklist Inspector Pro is free to download, with in-app purchases available.

### Which has better reviews, Si or Checklist Inspector Pro?

Checklist Inspector Pro is rated higher. Si averages 3.0 out of 5 from 2 ratings, while Checklist Inspector Pro averages 5.0 from 2 ratings.

### Do Si or Checklist Inspector Pro have ads?

Neither Si nor Checklist Inspector Pro shows ads.

### Which is updated more often, Si or Checklist Inspector Pro?

Si ships an update monthly, and Checklist Inspector Pro fortnightly. Most recently, Si was updated on October 6, 2026 and Checklist Inspector Pro on October 14, 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.*