Comparison

BirdieSync vs 28 Shift

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

Head to head
About

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.

Highlights
  • Automatic synchronization
  • Direct device-to-device transfer
  • Contact photo support
  • Multiple address books and calendars
  • Recurring events and alarms
  • Secure connection
Features
Read full description

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).

About

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.

Highlights
  • 28-day habit-building program
  • Daily tasks for consistency
  • Focus on discipline and mindset
  • Journaling for reflection
  • Scientifically proven methods
  • Progress tracking
  • Adaptable structure
Features
Read full description

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

BirdieSync2 screens
28 Shift4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 28 Shift sells 2 one-off in-app purchases. BirdieSync asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
BirdieSync versus 28 Shift: the parameters behind the verdict, then further details
ParameterBirdieSync28 Shift
PriceFreeFree
Rating5.0 (1 ratings) — better4.5 (11 ratings)
Positive reviews55.2% of reviews—
Number of ratings111 — better
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size4 MB51 MB
Age rating4+17+
DeveloperCalliciaShinobi Apps

Customer experience

BirdieSync

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews29 reviews
Positive55.2%
Neutral6.9%
Negative37.9%

28 Shift

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%

In-app purchases

None

BirdieSync

No in-app purchases

2 purchases

28 Shift

One-time2
  • 28 Days Program$29.99
  • Premium 28 Days Program$49.99

Questions

Is BirdieSync free?
BirdieSync is free to download, with no in-app purchases.
Is 28 Shift free?
28 Shift is free to download, with in-app purchases available.
Which has better reviews, BirdieSync or 28 Shift?
BirdieSync is rated higher. BirdieSync averages 5.0 out of 5 from 1 ratings, while 28 Shift averages 4.5 from 11 ratings.
Do BirdieSync or 28 Shift have ads?
Neither BirdieSync nor 28 Shift shows ads.
Which is updated more often, BirdieSync or 28 Shift?
BirdieSync ships an update every 2 months, and 28 Shift every 5 days. Most recently, BirdieSync was updated on October 17, 2026 and 28 Shift on October 10, 2026.

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