Calendar Busy Sync vs ProvenFlight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calendar Busy Sync
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Connect separate work, client, and personal calendars and mirror only busy time across the calendars you choose. Calendar Busy Sync creates private Busy holds on your other calendars for accepted commitments so you can avoid double-booking without exposing event details.
ProvenFlight
Effortlessly manage your military and civilian flight records with AI-powered data import and voice logging. Track career progress, currencies, and prepare for airline applications with comprehensive reporting and sharing options.
- AI-powered data import
- Voice logging
- Career and currency tracking
- Airline application preparation
- Public and private sharing options
- Support for multiple military record formats
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ProvenFlight (Proven Flight) is the AI-powered military logbook. Spend less time entering records and more time preparing for your next flying job. BRING YOUR FLIGHT HISTORY Import supported military records, civilian logbooks, spreadsheets, scans, and photos. Review the extracted flights and career records before saving. When the same flight shows up in more than one record, it merges into one complete entry with every detail instead of doubling up, and every flight stays connected to its source documents. LOG THE NEXT FLIGHT Speak a flight draft or enter it yourself. Keep your military duty, aircraft, landings, approaches, and crew details together. Use your logbook on mobile and the web. CAREER, CREDENTIALS, AND CURRENCY See your hours, crew positions, and flying conditions clearly. Manage evaluations, qualifications, currencies, and milestones, and follow your career on a timeline. Keep certificates, ratings, and your medical with their dates, and track FAA 61.57 currency. Military and civilian flying stay in one logbook, with civilian totals calculated from your records and conversion settings. Display your wings, patches, medals, and hour marks in a shadow box. ON YOUR HOME SCREEN Widgets show local and Zulu time, your 30-day and career hours, FAA currency, and your recent flights. PREPARE FOR AIRLINE APPLICATIONS Prepare airline hour worksheets, FAA 8710-1 totals, and a printable logbook. Build an interview PDF with your front pages, ledger, and original records in binder order. Review your logbook for gaps, duplicates, and inconsistencies before you print. SHARE YOUR FLYING Publish a public profile, or send a private link that can count hours the way an airline does. Crew, units, and call signs never appear. Flights, routes, tail numbers, and the logbook download stay off unless you turn them on. RECORDS FROM EVERY BRANCH Air Force ARMS and AFTO 781, Army CAFRS and DA 759, Navy and Marine Corps SHARP and M-SHARP, Coast Guard ALMIS, plus personal spreadsheets and civilian logbooks. Start free. Go Pro for unlimited imports from supported digital records, including service exports, spreadsheets, and typed PDFs, plus unlimited voice logging, the interview package, and every download. Pay once and Pro is yours, with no subscription. Scans and photos are supported too, with scanned pages included and optional packs if you need more. LEGAL Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://provenflight.com/terms-of-service Privacy Policy: https://provenflight.com/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: Calendar Busy Sync at none against ProvenFlight's 3. ProvenFlight's advantage is update cadence (every 3 days vs every 2 months). 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
Both are free to download. ProvenFlight sells 3 one-off in-app purchases. Calendar Busy Sync asks for nothing beyond the download.
Calendar Busy Sync ships an update every 2 months, ProvenFlight every 3 days. The most recent releases landed on October 28, 2026 and November 6, 2026 respectively.
| Parameter | Calendar Busy Sync | ProvenFlight |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 10 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Sous Chef Studio, Inc. | Cubic Insights LLC |
In-app purchases
Calendar Busy Sync
No in-app purchases
ProvenFlight
- 100 scanned pages$49.00
- 500 scanned pages$179.00
- Lifetime$299.00









