BirdieSync vs Keep Contacts
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BirdieSync
Seamlessly sync contacts and events between your iPhone and desktop applications like Thunderbird. Enjoy automatic updates across devices with a focus on data privacy, as information is transferred directly and securely without cloud storage.
- Automatic synchronization
- Direct device-to-device transfer
- Contact photo support
- Multiple address books and calendars
- Recurring events and alarms
- Secure connection
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Synchronize your contacts and events between your iPhone and Mozilla Thunderbird, Lightning and Sunbird on your PC. Keep your information up to date automatically: every modification on any device is automatically transferred to the other device. Keep your data private: your personal data is not stored in the cloud. It is directly synchronized between your device and your desktop computer through a secure connection and never goes through any third-party server. BirdieSync supports: contact photos, multiple address books and calendars, contact groups and categories, recurring events and alarms, ICS, calDAV, WCAP, Google Calendar types. Note: this app requires BirdieSync on your PC (19.95 €). You can download a fully-functional version and try it out free for 21 days (only Windows is supported).
Keep Contacts
Securely back up and restore your phone's contact lists for free. Easily manage, merge duplicates, and import/export contacts via a web interface. Sync across multiple devices and restore to a new phone if yours is lost or damaged.
- Contact backup and restore
- Sync across multiple devices
- Find and merge duplicate contacts
- Import and export contact lists
- Restore deleted contacts
- Web-based contact management
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What is Keep Contacts? Keep Contacts, formerly known as Everdroid, is a service that at its base stores your phones contact lists in a secure place - for free. If your phone is stolen or damaged, you will be able to restore your contact lists to a new phone. How to get started Getting started is easy – just download the app and sign in to start backing up your contacts. If you already have contacts on Keep these will be sent to your phone. And that's it - the app will synchronize any further changes and notify you if it needs your attention. And, of course, if you change to a new phone - just download the app, sign in and synchronize to get your contact list to the device. You can use several devices with the same account - these will then share contact list. Additional features We do not only offer a way to synchronize (backup and restore) your contact list. We also want to let your contact list shine. Therefore we have several tools on the Keep web that lets you update your contact list. If you head to keepcontacts.com you will find tools such as: - Finding duplicates and merging these - Manual merge of contacts - Creating, removing and editing contacts - Importing and exporting contact list - Restoring removed contacts from trash Contact and Support If you have any questions do not hesitate to contact us! Send a mail to support@keepcontacts.com and we will get back to you as soon as possible.
Screenshots
Verdict
The clearest difference is iOS requirement: BirdieSync at 8.0 against Keep Contacts's 15.0. On price, rating, review sentiment and ratings volume 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for BirdieSync against 5.0 for Keep Contacts. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 55% of BirdieSync's written reviews are positive against 50% of Keep Contacts's.
BirdieSync ships an update every 2 months, Keep Contacts every 6 weeks. The most recent releases landed on August 24, 2026 and September 20, 2026 respectively.
| Parameter | BirdieSync | Keep Contacts |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 55.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Callicia | Tactel ab |
Customer experience
BirdieSync
Keep Contacts
In-app purchases
BirdieSync
No in-app purchases
Keep Contacts
No in-app purchases
