BirdieSync vs 28 Shift
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).
28 Shift
This program guides you through a 28-day journey to build discipline, mental strength, and lasting habits. It offers daily tasks, reflection tools, and science-backed methods for personal growth and improved productivity.
- 28-day habit-building program
- Daily tasks for consistency
- Focus on discipline and mindset
- Journaling for reflection
- Scientifically proven methods
- Progress tracking
- Adaptable structure
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28 SHIFT – 28-Day Life Reset & Self-Improvement Program Take control of your life and build lasting habits with 28 Shift, the ultimate 28-day self-improvement program designed to help you develop discipline, mental strength, focus, and personal growth. Whether you want to improve your daily routine, boost productivity, or create positive habits that stick, 28 SHIFT provides a structured, science-backed approach to transforming your life. Why Choose 28 SHIFT for Your Personal Growth Journey? Daily habit-building tasks that keep you consistent and motivated. Focus on discipline, mindset, learning, and physical strength for all-around self-improvement. Journaling helps you reflect, stay focused, and track your growth. Scientifically proven methods to help you stay on track and avoid burnout. Flexible structure — adapt the program to your lifestyle and goals. Track progress, stay accountable, and build momentum every day. What You’ll Achieve with 28 SHIFT Stronger Discipline – Develop the mental toughness to stay consistent and break bad habits. Better Mindset & Focus – Improve your mental clarity, decision-making, and confidence. Effective Learning & Growth – Absorb knowledge faster and apply it to real life. Physical & Mental Strength – Build endurance, resilience, and a healthier routine. Better Sleep & Productivity – Wake up energized and take control of your time. 28 SHIFT is more than just a self-improvement app — it's your personal transformation system. By committing to this 28-day habit-building challenge, you'll create a foundation for success that lasts a lifetime. Start Your 28-Day Transformation Today! Take the first step toward self-discipline, productivity, and personal growth. Download 28 SHIFT now and begin your journey to a better, stronger you!
Screenshots
Verdict
The clearest difference is rating: BirdieSync at 5.0 against 28 Shift's 4.5. BirdieSync also leads on in-app purchases (none vs 2) and iOS requirement (8.0 vs 13.0). 28 Shift's advantage is update cadence (every 5 days vs every 2 months) and ratings volume (11 vs 1). On price, ads and device support 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. 28 Shift sells 2 one-off in-app purchases. BirdieSync asks for nothing beyond the download.
BirdieSync holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: 28 Shift has 11 ratings behind it against 1, so its average is the more settled of the two.
BirdieSync ships an update every 2 months, 28 Shift every 5 days. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.
| Parameter | BirdieSync | 28 Shift |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (11 ratings) |
| Positive reviews | 55.2% of reviews | — |
| Number of ratings | 1 | 11 — better |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 4 MB | 51 MB |
| Age rating | 4+ | 17+ |
| Developer | Callicia | Shinobi Apps |
Customer experience
BirdieSync
28 Shift
In-app purchases
BirdieSync
No in-app purchases
28 Shift
- 28 Days Program$29.99
- Premium 28 Days Program$49.99









