# A2Z Groups vs Wonder World System

The clearest difference is in-app purchases: Wonder World System at none against A2Z Groups's 5. Wonder World System also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. A2Z Groups sells 4 in-app purchases, starting at $0.99 per year. Wonder World System asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | A2Z Groups | Wonder World System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (3.9K ratings)](https://appshunter.io/ios/app/a2z-groups/id622492105/reviews)** | — |
| Number of ratings | **3.9K** | — |
| Positive reviews | 82.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Subscription | — |
| Size | 17 MB | 17 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Playa Apps](https://appshunter.io/developer/449814913) | [Merak Tech Company For Integrated Solutions](https://appshunter.io/developer/1550580733) |

## What reviewers say

### A2Z Groups

[App page](https://appshunter.io/ios/app/a2z-groups/id622492105)

Manage your contacts and send messages or emails to groups efficiently. Organize contacts, create custom groups, and send personalized mass communications. Features include backups, birthday reminders, and contact sharing.

**Highlights:** Create and manage contact groups, Send mass texts and group emails, Backup and restore contacts, Birthday and anniversary notifications, Share and export contacts, Clone contacts and groups

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 Year) | $0.99 | per year |
| Premium (Lifetime Access) | $1.99 | one-time |
| Make Contribution | $4.99 | one-time |
| Larger Contribution | $9.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient group messaging
- 💡 Helpful for organizing contacts
- 🔒 Reliable privacy policy
- 👍 Customizable groups

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🐛 Issues with message delivery
- 🐛 Syncing problems after updates
- 🐛 Duplicate contacts
- 🐛 Disappearing notes/data

**Reported bugs**

- Contacts being deleted unexpectedly
- Inability to save contact information
- Syncing issues with Google/Outlook contacts
- Unreliable group messaging

**Requested features**

- Scheduled messaging
- Improved group management
- Better integration with native Contacts app
- Map feature
- Birthdays/anniversaries tracking


### Wonder World System

[App page](https://appshunter.io/ios/app/wonder-world-system/id1643652978)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A2Z Groups free?

A2Z Groups is free to download, with in-app purchases available.

### Is Wonder World System free?

Wonder World System is free to download, with no in-app purchases.

### Do A2Z Groups or Wonder World System have ads?

Neither A2Z Groups nor Wonder World System shows ads.

### Which is updated more often, A2Z Groups or Wonder World System?

A2Z Groups ships an update every 3 weeks, and Wonder World System every 3 weeks. Most recently, A2Z Groups was updated on November 1, 2026 and Wonder World System on October 27, 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.*