# Contacts Sync Pro vs AMPFieldKit

The clearest difference is in-app purchases: AMPFieldKit at none against Contacts Sync Pro's 4. AMPFieldKit also leads on update cadence (every 2 weeks vs every 3 months) and rating (5.0 vs 4.7). Contacts Sync Pro's advantage is ratings volume (811 vs 3). On price, ads, device support and iOS requirement there is nothing between them.

Contacts Sync Pro costs $9.99 and AMPFieldKit $9.99 up front. Contacts Sync Pro sells 4 one-off in-app purchases. AMPFieldKit asks for nothing beyond the download.

AMPFieldKit holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Contacts Sync Pro has 811 ratings behind it against 3, so its average is the more settled of the two.

Contacts Sync Pro ships an update every 3 months, AMPFieldKit every 2 weeks. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Contacts Sync Pro | AMPFieldKit |
| --- | --- | --- |
| Price | $9.99 | $9.99 |
| Rating | [4.7 (811 ratings)](https://appshunter.io/ios/app/contacts-sync-pro/id686378579/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ampfieldkit/id6764323469/reviews)** |
| Number of ratings | **811** | 3 |
| Positive reviews | 87.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 42 MB | 4 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Playa Apps](https://appshunter.io/developer/449814913) | [AMP LLC (AL)](https://appshunter.io/developer/1895644769) |

## What reviewers say

### Contacts Sync Pro

[App page](https://appshunter.io/ios/app/contacts-sync-pro/id686378579)

Effortlessly synchronize your contacts across Google, iCloud, and Outlook. This reliable app ensures your contact information is up-to-date on your iPhone, supporting two-way syncing and preserving all contact details and groups.

**Highlights:** Sync Google, iCloud, and Outlook contacts, Two-way and one-way sync options, Syncs all contact fields and photos, Preserves Google labels and Outlook categories, Automatic background syncing, Duplicate contact elimination, Confirm changes before syncing

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Syncs | Free | one-time |
| Automatic Contact Syncing | Free | one-time |
| Make Contribution | $4.99 | one-time |
| Make Larger Contribution | $9.99 | one-time |

**What reviewers like**

- 🚀 Works flawlessly
- 👍 Easy to use
- 🚀 Reliable and accurate
- 🚀 Keeps contacts in sync
- 👍 Excellent responsiveness from developer

**What reviewers complain about**

- 🐛 UX has subtly changed for the worse
- 🐛 Confusing to use for just syncing one contact
- 🐛 Doesn't sync Gmail groups

**Reported bugs**

- Caused massive increase in number of contacts
- Eliminated all existing contacts

**Requested features**

- Improved handling of duplicate contacts
- Better side-by-side comparison of contacts


### AMPFieldKit

[App page](https://appshunter.io/ios/app/ampfieldkit/id6764323469)

This professional tool provides electricians and technicians with fast, accurate electrical calculations and essential reference data based on NEC guidelines. It offers a clean, mobile-optimized interface for real-world use, requiring no internet connection, ads, or subscriptions.

**Highlights:** Electrical Calculators (Power, Voltage Drop, Ampacity), Transformer & Motor Calculations, Conductor & Box Fill Calculations, Interactive Ohm's Law Chart, Unit Conversions & Material Properties, Offline Functionality

**In-app purchases:** none


## Frequently asked questions

### Is Contacts Sync Pro free?

Contacts Sync Pro costs $9.99, and also offers in-app purchases.

### Is AMPFieldKit free?

AMPFieldKit costs $9.99, with no in-app purchases.

### Which has better reviews, Contacts Sync Pro or AMPFieldKit?

AMPFieldKit is rated higher. Contacts Sync Pro averages 4.7 out of 5 from 811 ratings, while AMPFieldKit averages 5.0 from 3 ratings.

### Do Contacts Sync Pro or AMPFieldKit have ads?

Neither Contacts Sync Pro nor AMPFieldKit shows ads.

### Which is updated more often, Contacts Sync Pro or AMPFieldKit?

Contacts Sync Pro ships an update every 3 months, and AMPFieldKit every 2 weeks. Most recently, Contacts Sync Pro was updated on October 15, 2026 and AMPFieldKit on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*