# Spirit Level Plus vs SleepWindow

The clearest difference is update cadence: SleepWindow at weekly against Spirit Level Plus's every 6 months. Spirit Level Plus's advantage is iOS requirement (10.3 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Spirit Level Plus sells 1 one-off in-app purchase and SleepWindow sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Spirit Level Plus ships an update every 6 months, SleepWindow weekly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Spirit Level Plus | SleepWindow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (2.3K ratings)](https://appshunter.io/ios/app/spirit-level-plus/id635314551/reviews)** | — |
| Number of ratings | **2.3K** | — |
| Positive reviews | 23.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 3 MB |
| Requires iOS | **10.3** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [anthony mcmurtrey](https://appshunter.io/developer/1843712337) |

## What reviewers say

### Spirit Level Plus

[App page](https://appshunter.io/ios/app/spirit-level-plus/id635314551)

This app transforms your iPhone into a precise spirit level. It's ideal for various tasks including carpentry, home decoration, and measuring angles and slopes.

**Highlights:** Precise spirit level, Angle measurement, Slope measurement, Carpentry works, Home decoration

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tubular Level | $0.99 | one-time |

**What reviewers like**

- 🚀 Useful tool
- 👍 Handy for RVs and campers
- 👍 Accurate and reliable readings

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🔒 Paywall for basic functionality
- 🔋 High battery consumption
- 👎 Overly aggressive monetization

**Reported bugs**

- Incompatibility with iOS 8.1
- Frequent timeouts and resets

**Requested features**

- Horizontal and vertical level display
- Calibration options
- More customization settings


### SleepWindow

[App page](https://appshunter.io/ios/app/sleepwindow/id6762465676)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepWindow Premium | $1.99 | per month |
| SleepWindow Premium | $9.99 | per year |
| SleepWindow Lifetime Unlock | $7.99 | one-time |


## Frequently asked questions

### Is Spirit Level Plus free?

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

### Is SleepWindow free?

SleepWindow is free to download, with in-app purchases available.

### Do Spirit Level Plus or SleepWindow have ads?

Neither Spirit Level Plus nor SleepWindow shows ads.

### Which is updated more often, Spirit Level Plus or SleepWindow?

Spirit Level Plus ships an update every 6 months, and SleepWindow weekly. Most recently, Spirit Level Plus was updated on October 26, 2026 and SleepWindow on October 24, 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.*