# iKnowKeep vs Protractor Measuring Angle

The clearest difference is device support: iKnowKeep at 3 against Protractor Measuring Angle's 1. iKnowKeep also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iKnowKeep | Protractor Measuring Angle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/protractor-measuring-angle/id6785106013/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Free | Free |
| Size | 31 MB | 16 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [伟明 陈](https://appshunter.io/developer/1833071588) | [MSR TECH LLP](https://appshunter.io/developer/1761560109) |

## What reviewers say

### iKnowKeep

[App page](https://appshunter.io/ios/app/iknowkeep-ai-auto-accounting/id6751144017)

Automate your finances with AI-powered accounting. This app extracts data from emails and SMS, categorizes transactions, and provides visual reports for smart financial insights and budget management.

**Highlights:** Automated email and SMS bill parsing, AI-powered smart transaction categorization, Multi-dimensional financial insights and reports, Expenditure budget setting and monitoring, Categorized bill management with recurring bills, AI voice bookkeeping assistant

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

**In-app purchases:** none


### Protractor Measuring Angle

[App page](https://appshunter.io/ios/app/protractor-measuring-angle/id6785106013)

This app transforms your iPhone into a versatile digital measuring tool. It offers multiple functions to measure angles, slopes, distances, and even height using your device's sensors and camera. Save and review your measurement history for future reference.

**Highlights:** Inclinometer for real-time tilt measurement, Screen protractor for precise angle reading, Camera level with horizon overlay, Photo angle measurement on existing images, Height calculator using trigonometry, AR Measure for 3D space measurements, On-screen ruler and digital compass

**In-app purchases:** none


## Frequently asked questions

### Is iKnowKeep free?

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

### Is Protractor Measuring Angle free?

Protractor Measuring Angle is free to download, with no in-app purchases.

### Do iKnowKeep or Protractor Measuring Angle have ads?

Neither iKnowKeep nor Protractor Measuring Angle shows ads.

### Which is updated more often, iKnowKeep or Protractor Measuring Angle?

iKnowKeep ships an update every 2 days, and Protractor Measuring Angle every 2 days. Most recently, iKnowKeep was updated on October 28, 2026 and Protractor Measuring Angle 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.*