Chronograde
Timegrapher & watch tracker
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Turn your iPhone into a timegrapher: measure rate, beat error and amplitude for any mechanical watch. Plus atomic-time tracking, wear and service logs, and iCloud sync.
How fast or slow does your watch really run? Chronograde turns your iPhone into a timegrapher and an atomic-time accuracy tracker for your whole mechanical watch collection.
TIMEGRAPHER - LISTEN TO YOUR WATCH
- Rest your phone on the caseback and Chronograde "hears" the balance wheel
- Live rate in seconds per day, plus beat error and amplitude
- Automatic beat-rate (BPH) lock-on, or set it yourself from 18000 to 43200 bph
- Adjustable lift angle, and a boost mode for quiet movements
- The same spectral-flux signal processing real timegrapher software uses - all on your iPhone, no $1,000 machine required
ATOMIC-TIME ACCURACY
- Record a reading when your watch shows a target time; Chronograde compares it to NTP-synced atomic time
- Get a signed offset and a rate in seconds per day
- Time synced from public NTP servers (Apple, Google, NTP Pool), stable to a fraction of a second
- Works offline using your last sync or device clock (clearly labeled)
YOUR COLLECTION
- Unlimited watches with photos, brand, model, reference, serial, caliber
- A per-session drift chart for each watch - start a fresh session when the watch stops, gets serviced, or is set back to true time
- Sort by rate, last measured, last worn, or recently added
- Color-coded rate: green within plus or minus 10 s/day, orange to 30, red beyond
WEAR LOG
- One tap to log today's wear
- Days worn in the last 30 or 365 at a glance
- Full month-by-month history per watch
SERVICE HISTORY
- Log services, regulation, polish, battery, water-resistance, and more
- Track provider, cost, and notes
- Set an interval and Chronograde shows when the next service is due
ATOMIC CLOCK
- Large NTP-corrected clock face for setting your watch
- Multi-timezone, analog and digital, with live sync status
DATA YOU OWN
- Optional iCloud sync across iPhone and iPad via your Apple ID
- Export your full collection to Excel (watches, sessions, measurements, wear, service) or CSV
- Import watches from CSV with duplicate detection
- No accounts, no analytics, no ads, no third-party tracking
TRY IT FREE, THEN SUBSCRIBE
- Record up to 10 measurements free to try Chronograde
- Chronograde Pro unlocks everything else - the Timegrapher, unlimited measurements and sessions, wear and service logs, iCloud sync, and export
- Start with a 7-day free trial, then $1.99 per month, cancel anytime
- Optional one-time theme purchases (Submariner Blue, Racing Green, Rose Gold, Sunburst Gold), tied to your Apple ID and yours forever
Made for watch enthusiasts who care about the seconds.
---
Subscription details: $1.99 per month after the 7-day free trial. Renews automatically until cancelled in Settings > Apple ID > Subscriptions at least 24 hours before the next billing date. Payment is charged to your Apple ID.
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy: https://mwsupplylimited.github.io/chronograde/privacy.html
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Matthew Wong, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Matthew Wong
- Size
- 2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Sunburst Gold Theme ₱ 129.00
- Rose Gold Theme ₱ 129.00
- Racing Green Theme ₱ 129.00
- Submariner Blue Theme ₱ 129.00
- Copyright
- © 2026 MW Supply Limited