# Level gauge vs PDFkai

The clearest difference is ads: PDFkai at none against Level gauge's shown. PDFkai also leads on update cadence (every 2 days vs every 9 months). Level gauge's advantage is iOS requirement (15.0 vs 18.5). On price, 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.

Level gauge ships an update every 9 months, PDFkai every 2 days. The most recent releases landed on October 15, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Level gauge | PDFkai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/level-gauge/id558393386/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 93.6% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 16 MB | 1 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tatsuki](https://appshunter.io/developer/558393529) | [Kohei YAMAMOTO](https://appshunter.io/developer/1886637159) |

## What reviewers say

### Level gauge

[App page](https://appshunter.io/ios/app/level-gauge/id558393386)

This intuitive tool allows you to measure angles and levels in multiple orientations. It offers high precision with smooth movement and includes calibration and hold functions for stable readings. Customize its appearance while enjoying its powerful yet simple design.

**Highlights:** Measure horizontal, vertical, and flat angles, High precision measurements, Smooth and stable readings, Calibration function, Hold function, Customizable appearance

**Features:** Vision Pro support

**In-app purchases:** none


### PDFkai

[App page](https://appshunter.io/ios/app/pdfkai/id6760888905)

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

**In-app purchases:** none


## Frequently asked questions

### Is Level gauge free?

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

### Is PDFkai free?

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

### Do Level gauge or PDFkai have ads?

Level gauge shows ads; PDFkai does not.

### Which is updated more often, Level gauge or PDFkai?

Level gauge ships an update every 9 months, and PDFkai every 2 days. Most recently, Level gauge was updated on October 15, 2026 and PDFkai on September 28, 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.*