# JHT Engineering APP vs Duplicate Contact Cleaner Ⓞ

The clearest difference is in-app purchases: JHT Engineering APP at none against Duplicate Contact Cleaner Ⓞ's 1. JHT Engineering APP also leads on ads (none vs shown) and iOS requirement (12 vs 15.0). Duplicate Contact Cleaner Ⓞ's advantage is update cadence (every 2 months vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Duplicate Contact Cleaner Ⓞ sells 1 one-off in-app purchase. JHT Engineering APP asks for nothing beyond the download.

JHT Engineering APP ships an update every 4 months, Duplicate Contact Cleaner Ⓞ every 2 months. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | JHT Engineering APP | Duplicate Contact Cleaner Ⓞ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (131 ratings)](https://appshunter.io/ios/app/duplicate-contact-cleaner/id1575491782/reviews)** |
| Number of ratings | — | **131** |
| Positive reviews | — | 55.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 43 MB |
| Requires iOS | **12** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JOHNSON HEALTH TECH CO., LTD.](https://appshunter.io/developer/994439492) | [RV AppStudios LLC](https://appshunter.io/developer/340181308) |

## What reviewers say

### JHT Engineering APP

[App page](https://appshunter.io/ios/app/jht-engineering-app/id1474324542)

**In-app purchases:** none


### Duplicate Contact Cleaner Ⓞ

[App page](https://appshunter.io/ios/app/duplicate-contact-cleaner/id1575491782)

Effortlessly manage your address book with this smart cleaner. It quickly scans, merges, and removes duplicate contacts, offering backup and restore options for peace of mind. Organize your contacts with simple, intuitive tools.

**Highlights:** Scan for duplicate contacts, Merge similar contacts, Delete unwanted contacts, Backup and restore contacts, Sync and transfer contacts, Recover deleted contacts

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is JHT Engineering APP free?

JHT Engineering APP is free to download, with no in-app purchases.

### Is Duplicate Contact Cleaner Ⓞ free?

Duplicate Contact Cleaner Ⓞ is free to download, with in-app purchases available.

### Do JHT Engineering APP or Duplicate Contact Cleaner Ⓞ have ads?

Duplicate Contact Cleaner Ⓞ shows ads; JHT Engineering APP does not.

### Which is updated more often, JHT Engineering APP or Duplicate Contact Cleaner Ⓞ?

JHT Engineering APP ships an update every 4 months, and Duplicate Contact Cleaner Ⓞ every 2 months. Most recently, JHT Engineering APP was updated on October 6, 2026 and Duplicate Contact Cleaner Ⓞ on October 11, 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.*