Comparison

Contacts + Sync Google, Backup vs OLM Viewer

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

Head to head
About

Contacts + Sync Google, Backup

Organize your address book with powerful tools for cleaning up duplicates, deleting contacts in bulk, and managing favorites. Syncs seamlessly with Google Contacts and provides timely reminders for important dates. Includes a business card scanner and backup options.

Highlights
  • Bulk contact deletion
  • Favorite contact management
  • Google Contacts synchronization
  • Birthday and event reminders
  • Business card scanning
  • Contact backup and export
  • Duplicate contact detection
Features
Read full description

## Contacts + The fastest way to a clutter-free contact list. Is your address book filled with outdated numbers, "Pizza Delivery" from three cities ago, and nameless entries? **Contacts** is the ultimate utility designed to help you reclaim your phone’s organization in seconds. Key Features: Bulk Delete with Ease: The star of the show. Select multiple contacts or your entire list and wipe away the clutter with a single tap. No more tedious one-by-one deleting. One-Tap Favorites Management Quickly curate your inner circle. Browse your list and mark important contacts as Favorites with a single tap, ensuring your most-called people are always at the top and protected from accidental deletion. Google Contacts Sync: Manage your cloud directly. Changes made in the app—including bulk deletions and favorites—automatically sync with your Google account across all your devices. Keep your Gmail and phone address books perfectly aligned in real-time. Event & Birthday Reminder: Never miss a special moment. The app automatically scans your contacts for upcoming birthdays and anniversaries, sending you timely reminders. You can also quickly add missing dates to ensure your calendar is always up to date. Business Card Scanner: Stop typing and start scanning. Just point your camera at any business card, and our advanced technology will instantly extract names, phone numbers, and emails, saving them directly to your contact. Backup: Clean with zero anxiety. Create a full backup of your entire contact list in seconds. Delete Duplicate or Merge: Stop scrolling through three "John Smiths." Our intelligent algorithm scans your entire list for duplicate names, phone numbers, or emails. Export: your data as a VCF or CSV(Excel) file or save it to the cloud, ensuring you can restore every single number if you ever change your mind. Choose between the following subscription options for unlimited access to all features: - Annual Subscription - Month Subscription - Weekly - You may cancel your subscription at any time Your account will be automatically charged for renewal, based on the annual subscription plan, within 24 hours before the end of the 7 days free trial period. You can cancel auto-renewal at any time, given that the cancellation is at least 24 hours before the end of the current period. Privacy policy: https://ervi.dev/privacy-policy Terms of use: https://ervi.dev/terms-of-use

About

OLM Viewer

Features
Read full description

OLM Viewer & Converter is a powerful, privacy-first utility designed to help you easily open OLM files, read OLM email archives, and export mailbox data natively on your device. WHETHER YOU NEED AN OLM READER OR CONVERTER: If you have a Mac Outlook file (file OLM) and need an efficient OLM viewer or OLM reader, this app provides an intuitive solution to inspect and process your data. You can open OLM files instantly without needing third-party software or uploading sensitive mailboxes to external cloud servers. KEY FEATURES: • Seamless OLM File Viewing: Open OLM archives, browse nested mail folders, read OLM email messages, view calendar entries, and check contacts. • Convert OLM File to CSV: Export structured mailbox records to spreadsheets. Use our OLM to CSV converter capabilities to convert OLM to CSV on Mac or iOS, or convert OLM file to Excel on Mac for easy data analysis. • Convert OLM to MBOX: Need an OLM to MBOX converter? Export your email folders into universal MBOX formats (convert OLM to MBOX Mac) for seamless mail client migration. • Convert OLM to PDF & EML: Easily convert OLM to PDF for printing and document archiving, or export messages as standard EML files. • Export Contacts & Calendars: Convert OLM to ICS for calendar events and vCard for address book contacts. MAILBOX MIGRATION & EXPORT OPTIONS: If you are searching for an OLM to PST converter or need to convert OLM file to PST format, our tool provides the ideal intermediate formats. While direct OLM to PST conversion is restricted on mobile, exporting your file OLM to MBOX or CSV enables smooth workflows to import OLM to Mac Mail, import OLM to Gmail, import OLM to Google Calendar, or import OLM to Office 365. Users looking to import OLM file data into enterprise platforms can use our generated standard files to import OLM to Office 365 Mac or import OLM into Office 365 accounts smoothly. Whether you need a Mac OLM converter, an OLM converter for Mac desktop/mobile environments, or a trusted OLM to CSV converter for Mac, this tool handles your archive export requirements effortlessly. PRIVACY & SECURITY FIRST: • 100% On-Device Processing: Every OLM file is parsed locally. Your emails, attachments, and personal records never leave your physical device. • Tracking Prevention: External tracking pixels and remote images are blocked by default to protect your privacy. Download OLM Viewer & Converter today to open, read, and export OLM file archives with total peace of mind!

Screenshots

Contacts + Sync Google, Backup4 screens
OLM Viewer3 screens

Verdict

The call

The clearest difference is ads: OLM Viewer at none against Contacts + Sync Google, Backup's shown. OLM Viewer also leads on device support (4 vs 1) and iOS requirement (15.0 vs 17.6). Contacts + Sync Google, Backup's advantage is update cadence (every 5 days vs every 3 weeks). On price and in-app purchases 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. Contacts + Sync Google, Backup sells 3 in-app purchases, starting at $2.99 per 7 days and OLM Viewer sells 2 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Contacts + Sync Google, Backup ships an update every 5 days, OLM Viewer every 3 weeks. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
Contacts + Sync Google, Backup versus OLM Viewer: the parameters behind the verdict, then further details
ParameterContacts + Sync Google, BackupOLM Viewer
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 5 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod, Mac — better
Requires iOS17.615.0 — better
Further details — not scored
Size34 MB29 MB
Age rating4+4+
DeveloperERVI FIRST LLCOMER FARUK KIZILTUG

In-app purchases

3 purchases

Contacts + Sync Google, Backup

Subscriptions2
  • Weekly3 Days trial$2.997 Days
  • Monthly$69.991 Year
One-time1
  • Upgrade to PRO$5.99
2 purchases

OLM Viewer

Subscriptions2
  • Weekly Premium3 Days trial$7.997 Days
  • Yearly Premium$49.991 Year

Questions

Is Contacts + Sync Google, Backup free?
Contacts + Sync Google, Backup is free to download, with in-app purchases available.
Is OLM Viewer free?
OLM Viewer is free to download, with in-app purchases available.
Do Contacts + Sync Google, Backup or OLM Viewer have ads?
Contacts + Sync Google, Backup shows ads; OLM Viewer does not.
Which is updated more often, Contacts + Sync Google, Backup or OLM Viewer?
Contacts + Sync Google, Backup ships an update every 5 days, and OLM Viewer every 3 weeks. Most recently, Contacts + Sync Google, Backup was updated on October 23, 2026 and OLM Viewer on October 31, 2026.

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