# Smart Level & AR Ruler vs Karpro

The clearest difference is in-app purchases: Karpro at none against Smart Level & AR Ruler's 4. Karpro also leads on rating (5.0 vs 4.7). Smart Level & AR Ruler's advantage is ratings volume (485 vs 1) and update cadence (every 2 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Smart Level & AR Ruler sells 4 in-app purchases, starting at $4.99 per 7 days. Karpro asks for nothing beyond the download.

Karpro holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Smart Level & AR Ruler has 485 ratings behind it against 1, so its average is the more settled of the two.

Smart Level & AR Ruler ships an update every 2 weeks, Karpro every 6 weeks. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Smart Level & AR Ruler | Karpro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (485 ratings)](https://appshunter.io/ios/app/smart-level-and-ar-ruler/id6698865336/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/karpro/id6717590358/reviews)** |
| Number of ratings | **485** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 42 MB | 79 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | +4 | 4+ |
| Developer | [卓 张](https://appshunter.io/developer/1765233606) | [Karpro Corporation](https://appshunter.io/developer/1770460482) |

## What reviewers say

### Smart Level & AR Ruler

[App page](https://appshunter.io/ios/app/smart-level-and-ar-ruler/id6698865336)

This app transforms your iPhone into a versatile digital toolbox. It offers a wide array of measurement and utility tools, utilizing advanced AI and computer vision for precise results.  From measuring lengths and areas to using a protractor and level, it helps you tackle various tasks.

**Highlights:** Length, area, height, distance measurement, Protractor and unit conversion, Level and light sensor, Decibel meter, Scientific calculator, Magnifying glass and compass

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| VIP - Week | $9.99 | per 7 days |
| Monthly Subscription | $19.99 | per month |
| VIP - Year | $69.99 | per year |


### Karpro

[App page](https://appshunter.io/ios/app/karpro/id6717590358)

Find and book local mechanics for car maintenance and repairs. Request quotes, schedule services, and make secure payments through an escrow system. Enjoy a transparent and convenient car repair experience.

**Highlights:** Find local mechanics, Request quotes, Schedule services, Secure escrow payments, Streamlined repair process

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Smart Level & AR Ruler free?

Smart Level & AR Ruler is free to download, with in-app purchases available.

### Is Karpro free?

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

### Which has better reviews, Smart Level & AR Ruler or Karpro?

Karpro is rated higher. Smart Level & AR Ruler averages 4.7 out of 5 from 485 ratings, while Karpro averages 5.0 from 1 ratings.

### Do Smart Level & AR Ruler or Karpro have ads?

Neither Smart Level & AR Ruler nor Karpro shows ads.

### Which is updated more often, Smart Level & AR Ruler or Karpro?

Smart Level & AR Ruler ships an update every 2 weeks, and Karpro every 6 weeks. Most recently, Smart Level & AR Ruler was updated on October 25, 2026 and Karpro on October 20, 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.*