# Spirit Level smart vs HM01

The clearest difference is in-app purchases: HM01 at none against Spirit Level smart's 1. HM01 also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Spirit Level smart sells 1 one-off in-app purchase. HM01 asks for nothing beyond the download.

Spirit Level smart ships an update every 2 months, HM01 fortnightly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Spirit Level smart | HM01 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 24 MB | 115 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [ShanTou City Vison Electronictechnology Co., Ltd.](https://appshunter.io/developer/1388222999) |

## What reviewers say

### 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 |


### HM01

[App page](https://appshunter.io/ios/app/hm01/id6749028679)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spirit Level smart free?

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

### Is HM01 free?

HM01 is free to download, with no in-app purchases.

### Do Spirit Level smart or HM01 have ads?

Neither Spirit Level smart nor HM01 shows ads.

### Which is updated more often, Spirit Level smart or HM01?

Spirit Level smart ships an update every 2 months, and HM01 fortnightly. Most recently, Spirit Level smart was updated on November 4, 2026 and HM01 on October 30, 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.*