Comparison

A2Z Groups vs SynergyOS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

A2Z Groups

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
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A2Z is the complete contact manager! With A2Z, you can easily create, edit, and delete contacts & groups. Send mass texts and group emails. View recently created contacts. Share or print your contacts. Create backups. Get birthday notifications. And so much more: CONTACTS: • View all of your contacts organized by account or group • Easily find a contact with A2Z's powerful search tool • Select multiple contacts and perform a number of actions including text, email, share, and delete • Quickly perform a number of functions with one touch directly from the contact card GROUPS: • Create groups of contacts from any account including iCloud, Google, Exchange or Outlook • Filter contacts by one or more groups at the same time • Add & remove contacts from a particular group • Add & remove groups from a particular contact FAVORITES: • Create a list of favorites allowing you to quickly call/message/email those contacts GROUP EMAILS & MESSAGES: • Send messages to groups via iMessage, SMS, & WhatsApp • Send emails to groups via Mail App or Gmail App • Attach photos & documents, including from Dropbox • Assign the to/cc/bcc email field to each contact individually • Give your message a personal touch - Automatically refer to each contact by name COMPANIES, BIRTHDAYS, ANNIVERSARIES, MOST VIEWED, RECENTLY CREATED/MODIFIED/DELETED: • Sort your contacts by company name • View upcoming birthdays & anniversaries • View your most frequently viewed contacts • View recently created & modified contacts • View & restore your recently deleted contacts SHARE CONTACTS: • Share one or more contacts via text message, email, or various other services • Export contacts in the CSV or vCard format DELETE CONTACTS & GROUPS: • Quickly delete contacts & groups BACKUP: • Create a backup of any contact account • Restore your backup to any contact account CLONE CONTACTS & GROUPS: • Clone a contact from the contact card screen including all contact fields & groups • Clone a group so you don't have to add all of the group members manually START SCREEN: • Specify whether the app should load the contacts, groups, or favorites screen at startup SHORTCUTS: • Press & hold a contact or group to conveniently perform a number of common functions SYNC CONTACTS WITH GOOGLE: • Fully compatible with the "Contacts Sync" app WORKS WELL WITH OTHER CONTACT APPS: • Any contact changes you make with this app will be reflected in any other contact app that queries the iPhone address book (including the standard Contacts & Phone app) SUBSCRIPTIONS: • A2Z Contacts offers a "Premium" subscription which unlocks all of the premium features in the app, including unrestricted group emails and texts, unrestricted sharing of contacts, and access to future premium features. • The "Premium" subscription is priced at $0.99 USD and the subscription length is 1 year • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Account will be charged for renewal within 24-hours prior to the end of the current period, at a cost of $0.99 USD • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable • Terms of use: https://playaapps.zendesk.com/hc/en-us/articles/360003030954 • Privacy Policy: https://playaapps.zendesk.com/hc/articles/229824667

About

SynergyOS

Enhance team productivity and collaboration with a unified platform for communication and file management. This secure app enables instant chats and efficient organization, allowing teams to work together seamlessly from any location.

Highlights
  • Instant team chats
  • Secure file management
  • Unified platform
  • Remote work support
  • Efficient organization
Features
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Improve productivity and collaboration with SynergyOS Mobile. Collaborate instantly with Chats, and manage your files with Drive — all in one secure, unified platform. SynergyOS empowers your team to communicate, organize, and work efficiently from anywhere. Note: SynergyOS is available exclusively for business and enterprise customers.

Screenshots

A2Z Groups4 screens
SynergyOS4 screens

Verdict

The call

The clearest difference is in-app purchases: SynergyOS at none against A2Z Groups's 5. SynergyOS also leads on rating (5.0 vs 4.6) and update cadence (every 5 days vs every 3 weeks). A2Z Groups's advantage is ratings volume (3.9K vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

SynergyOS holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: A2Z Groups has 3.9K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

A2Z Groups ships an update every 3 weeks, SynergyOS every 5 days. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
A2Z Groups versus SynergyOS: the parameters behind the verdict, then further details
ParameterA2Z GroupsSynergyOS
PriceFreeFree
Rating4.6 (3.9K ratings)5.0 (1 ratings) — better
Positive reviews81.9% of reviews—
Number of ratings3.9K — better1
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.1 — better
Further details — not scored
Size17 MB28 MB
Age rating4+4+
DeveloperPlaya AppsSynergy Inc.

Customer experience

A2Z Groups

All ratings3,901 ratings
Positive91.4%
Neutral4.2%
Negative4.4%
Written reviews519 reviews
Positive81.9%
Neutral4.8%
Negative13.3%

SynergyOS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

A2Z Groups

Reported bugs

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

Requested features

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

SynergyOS

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

A2Z Groups

Subscriptions1
  • Premium (1 Year)2 variants$0.991 Year
One-time3
  • Premium (Lifetime Access)$1.99
  • Make Contribution$4.99
  • Larger Contribution$9.99
None

SynergyOS

No in-app purchases

Questions

Is A2Z Groups free?
A2Z Groups is free to download, with in-app purchases available.
Is SynergyOS free?
SynergyOS is free to download, with no in-app purchases.
Which has better reviews, A2Z Groups or SynergyOS?
SynergyOS is rated higher. A2Z Groups averages 4.6 out of 5 from 3.9K ratings, while SynergyOS averages 5.0 from 1 ratings.
Do A2Z Groups or SynergyOS have ads?
Neither A2Z Groups nor SynergyOS shows ads.
Which is updated more often, A2Z Groups or SynergyOS?
A2Z Groups ships an update every 3 weeks, and SynergyOS every 5 days. Most recently, A2Z Groups was updated on October 20, 2026 and SynergyOS on October 7, 2026.

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