# Knowho - Private & Spam Guard — Manage caller ID, no app sync

> Manage caller ID, no app sync (iPhone/iPad app by Jae Hee SHIM.)

- Source: https://appshunter.io/ios/app/knowho-private-and-spam-guard/id6760998976 (this page in markdown: same URL + `.md`)
- Developer: [Jae Hee SHIM](https://appshunter.io/developer/1887206490)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: English, Japanese, Korean
- Released: 2026-03-26
- Data updated: 2026-06-29
- User reviews in markdown: https://appshunter.io/ios/app/knowho-private-and-spam-guard/id6760998976/reviews.md

## What is Knowho?

Knowho is a caller ID app built around your personal whitelist — not a spam database. 

Spam block Apps known spam numbers. But voice phishing numbers change daily. 
Unknown numbers slip right through.
     
Knowho flips the approach.                                                  
  • You register only the numbers you trust. Everything else? Stay alert.
  • No matter how many times scammers change their number — they can't fool a whitelist. 
 
Features                                                                    
  • Import numbers from Notes, SMS, messenger apps — anywhere with a share button                                                                        
  • Completely separate from iOS Contacts                                                                      
  • Registered names shown automatically on incoming calls                                                      
  • Fully offline · No data collection — Your contacts stay on your device and are never sent to any server

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Knowho Pro | $1.99 | one-time |



## Version history (last 3 releases)

### 1.0.3 — 2026-04-28

A small update is here.
  • Added warning icon when Caller ID is disabled.

### 1.0.1 — 2026-03-29

A small but handy update is here.    
  • Jump to any contact instantly!                                            
  • Try dragging the bar on the right side of the screen.

### 1.0 — 2026-03-26

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-29.*