# Contacts+ | Address Book vs ACTS Authenticator

The clearest difference is in-app purchases: ACTS Authenticator at none against Contacts+ | Address Book's 8. Contacts+ | Address Book's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Contacts+ | Address Book sells 8 in-app purchases, starting at $9.99 per month. ACTS Authenticator asks for nothing beyond the download.

Contacts+ | Address Book ships an update every 2 weeks, ACTS Authenticator every 2 months. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Contacts+ | Address Book | ACTS Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (5.8K ratings)](https://appshunter.io/ios/app/contacts-plus-address-book/id579616837/reviews)** | — |
| Number of ratings | **5.8K** | — |
| Positive reviews | 59.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 45 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [FullContact Inc.](https://appshunter.io/developer/489685226) | [North American Division of Seventh-day Adventists](https://appshunter.io/developer/1305324405) |

## What reviewers say

### Contacts+ | Address Book

[App page](https://appshunter.io/ios/app/contacts-plus-address-book/id579616837)

This cloud-based address book simplifies contact management by syncing across devices and accounts. It offers features like contact deduplication, business card scanning, and automatic enrichment to keep your information organized and up-to-date.

**Highlights:** Cross-device, cross-platform sync, Contact deduplication, Scan and save business cards, Tag contacts and add notes, Automatic contact enrichment, Spam blocking

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $9.99 | per month |
| Contacts+ Quarterly Premium | $13.99 | per month |
| Contacts+ Monthly Premium | $15.99 | per month |
| Premium (Quarterly) | $29.99 | per 3 months |
| Contacts+ Quarterly Premium | $39.99 | per 3 months |
| Premium (Annual) | $99.99 | per year |
| Contacts+ Yearly Premium | $119.99 | per year |
| Pack of 100 business cards | $9.99 | one-time |

**What reviewers like**

- 🚀 Easy contact management
- 🔍 Useful contact enrichment
- 📚 Great contact organization
- 🔗 Seamless sync across platforms

**What reviewers complain about**

- 🐛 Unreliable sync and data loss
- 💰 Expensive subscription model
- 🔍 Inaccurate contact information
- 🤯 Confusing user experience

**Reported bugs**

- App crashes and freezes on latest iOS versions
- Sync issues causing duplicate and missing contacts
- Inability to restore deleted or lost contacts

**Requested features**

- Native integration with Outlook and Microsoft 365
- Improved contact deduplication and merging
- Better support for international contacts and languages
- Customizable contact fields and views


### ACTS Authenticator

[App page](https://appshunter.io/ios/app/acts-authenticator/id6503090953)

**In-app purchases:** none


## Frequently asked questions

### Is Contacts+ | Address Book free?

Contacts+ | Address Book is free to download, with in-app purchases available.

### Is ACTS Authenticator free?

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

### Do Contacts+ | Address Book or ACTS Authenticator have ads?

Neither Contacts+ | Address Book nor ACTS Authenticator shows ads.

### Which is updated more often, Contacts+ | Address Book or ACTS Authenticator?

Contacts+ | Address Book ships an update every 2 weeks, and ACTS Authenticator every 2 months. Most recently, Contacts+ | Address Book was updated on October 16, 2026 and ACTS Authenticator on October 17, 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.*