# SDC BSO vs Spirit Level smart

The clearest difference is in-app purchases: SDC BSO at none against Spirit Level smart's 1. SDC BSO also leads on iOS requirement (11.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Spirit Level smart sells 1 one-off in-app purchase. SDC BSO asks for nothing beyond the download.

SDC BSO ships an update every 6 weeks, Spirit Level smart every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | SDC BSO | Spirit Level smart |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 49 MB | 24 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tzu An Wen](https://appshunter.io/developer/1196209054) | [akira ohmachi](https://appshunter.io/developer/1338624340) |

## What reviewers say

### SDC BSO

[App page](https://appshunter.io/ios/app/sdc-bso/id1498155196)

This utility app provides a dedicated pitch clock function for fieldforce operations. It was updated to include this specific feature, enhancing its functionality for users requiring precise timing.

**Highlights:** Pitch clock function, Fieldforce operations support, Updated functionality, Precise timing

**Features:** macOS Compatibility

**In-app purchases:** none


### Spirit Level smart

[App page](https://appshunter.io/ios/app/spirit-level-smart/id6473119678)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is SDC BSO free?

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

### Is Spirit Level smart free?

Spirit Level smart is free to download, with in-app purchases available.

### Do SDC BSO or Spirit Level smart have ads?

Neither SDC BSO nor Spirit Level smart shows ads.

### Which is updated more often, SDC BSO or Spirit Level smart?

SDC BSO ships an update every 6 weeks, and Spirit Level smart every 2 months. Most recently, SDC BSO was updated on November 3, 2026 and Spirit Level smart on November 4, 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.*