Comparison

PRO TREK Connected vs Twelve O'clock

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

Head to head
About

PRO TREK Connected

This app connects your compatible CASIO watch to your iPhone via Bluetooth. It enables various Mobile Link functions to enhance your watch experience and allows for simplified watch operations through your phone's screen. Data can be transferred to the new CASIO WATCHES app.

Highlights
  • Bluetooth watch connectivity
  • Mobile Link functions
  • Simplified watch operations
  • User data transfer
  • iPhone integration
Features
Read full description

Important - Please Read Request to Transfer to the CASIO WATCHES App (Support Termination Notification) The functionality of this app will be transferred to the new watch app, CASIO WATCHES. By updating to version 3.0, users of this app will be able to transfer their user data to CASIO WATCHES via this app. While we understand this may be inconvenient for some users, we ask that you transfer your data across, and continue using CASIO WATCHES in place of this app. Please see the support page for more details. https://world.casio.com/support/wat/info/20230322/en/ ●Description This is the basic application for connecting and communicating with a Bluetooth(R) v4.0 enabled CASIO watch. Pairing your watch with an iPhone enables use of a variety of different Mobile Link functions that greatly enhance the iPhone experience. The PRO TREK Connected app also simplifies certain watch operations by letting you perform them on your phone screen. Visit the website below for details. https://protrek.casio.com/ We recommend using PRO TREK Connected on the following operating systems. Operation is not guaranteed for any operating system not listed below. Even if an operating system has been confirmed as compatible, software updates or display specifications may prevent proper display and/or operation. ⋅ iOS 14 or later. Applicable Watches: PRT-B50, PRT-B70 *Some watches unavailable in your region may be displayed in the application. Continued use of GPS running in the background can dramatically decrease battery life.

About

Twelve O'clock

Easily track the accuracy of your mechanical watches over time. Manually log checkpoints to calculate seconds per day and visualize performance with charts. Manage your watch collection with photos and learn more about horology.

Highlights
  • Manage watch collection
  • Add/edit/remove watches
  • Include watch photos
  • Track watch accuracy
  • Calculate seconds per day
  • View accuracy charts
  • Horology content
Features
Read full description

Twelve O’clock is an app that helps track your watch accuracy easily in a realistic way. I can’t stress this enough: it’s “tracking”, not measuring instantaneous accuracy like a timegrapher device. It’s a manual and oldschool job but it brings so much fun. It reminds me of the old days when I had to synchronize my watch to the clock on the TV at 7pm every day. With Twelve O'clock you can: ** MANAGE YOUR WATCH COLLECTION * Add, edit, remove any item in a list of your watch collection * Include a nice wristshot of each watch ** KNOW YOUR WATCH ACCURACY * Simply add some checkpoints and let the app calculate the accuracy in *second per day* * A nice chart of the accuracy over the time ** LEARN MORE ABOUT HOROLOGY * Curated content for watch lovers (like me)

Screenshots

PRO TREK Connected2 screens
Twelve O'clock4 screens

Verdict

The call

The clearest difference is review sentiment: Twelve O'clock at 91% against PRO TREK Connected's 48%. Twelve O'clock also leads on update cadence (every 3 weeks vs every 2 months). PRO TREK Connected's advantage is in-app purchases (none vs 1) and rating (4.6 vs 4.4). 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. Twelve O'clock sells 1 one-off in-app purchase. PRO TREK Connected asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PRO TREK Connected holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 345 and 83 respectively. Written reviews complicate that: 48% of PRO TREK Connected's written reviews are positive against 91% of Twelve O'clock's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

PRO TREK Connected ships an update every 2 months, Twelve O'clock every 3 weeks. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

Scorecard7 real differences · 3 level
PRO TREK Connected versus Twelve O'clock: the parameters behind the verdict, then further details
ParameterPRO TREK ConnectedTwelve O'clock
PriceFreeFree
Rating4.6 (345 ratings) — better4.4 (83 ratings)
Positive reviews48.4% of reviews91.1% of reviews — better
Number of ratings345 — better83
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better15.0
Further details — not scored
Size242 MB46 MB
Age rating4+4+
DeveloperCASIO COMPUTER CO., LTD.Hieu Pham

Customer experience

PRO TREK Connected

All ratings345 ratings
Positive91.3%
Neutral3.8%
Negative4.9%
Written reviews64 reviews
Positive48.4%
Neutral9.4%
Negative42.2%

Twelve O'clock

All ratings82 ratings
Positive84.1%
Neutral1.2%
Negative14.6%
Written reviews123 reviews
Positive91.1%
Neutral0.8%
Negative8.1%

User reviews

PRO TREK Connected

From 345 App Store ratings

What we love

  • 👍 Useful app for Pro Trek
  • ⌚️ Seamless watch connection
  • 🧭 Multifunctional watch features
  • 💪 Robust and durable watch
  • ⏱️ Accurate timekeeping

Room to improve

  • 📉 Complicated to use
  • ❓ Manual difficult to read
  • 🔌 Watch not connecting
  • ⏳ Auto backlight turns off
  • ⚙️ Watch constantly out of sync

Twelve O'clock

From 83 App Store ratings

What we love

  • 👍 Intuitive and simple user interface
  • 💰 Excellent value at $0.99 one-time purchase
  • 🎯 Accurate watch accuracy tracking
  • ⏱️ Flexible checkpoint timing (0, 15, 30, 45 seconds)
  • 📊 Clear data visualization and graphs

Room to improve

  • 🐛 App freezes and crashes frequently
  • 💾 Data loss after updates
  • ⚠️ Free version severely limited (5 checkpoints only)
  • 🔔 Silent mode prevents beeping sounds
  • 🎯 Requires learning curve for some users

Bugs and requests

PRO TREK Connected

Reported bugs

20 issues
  • New version not updating
  • Watch not connecting after update
  • Auto backlight turns off randomly
  • Step counter weekly view off by one day
  • Watch constantly out of time
Show 15 more
  • Pairing to iPhone fails
  • App force closes right after opening
  • App crashes after launch
  • Watch shows incorrect time after setup
  • Suddenly unable to connect
  • Pairing fails after app reinstall
  • Watch shows error message 'Recover' or date 1/01
  • Watch is constantly out of sync
  • Alarm buttons not active in app
  • Route is not recorded
  • App bounces after pairing
  • Cannot connect watch PRT-B50
  • Step counter overcounting
  • Cannot connect to iPhone 11
  • Cannot connect PRG-650Y

Requested features

15 requests
  • Add Russian language support
  • Improve app intuitiveness and simplicity
  • Add ability to locate lost watch
  • Enhance fishing port data
  • Increase domestic data
Show 10 more
  • Add option for auto light after sunset/before sunrise
  • Sync with standard Apple Health app
  • Translate pressure to mmHg
  • Add ability to add friends or join groups for step counter
  • Add option to add photos to fish memo
  • Add option to delete fish memo entries
  • Allow offline manual viewing
  • Support Apple Health for steps
  • Add import function for destination location
  • Add calibration options for stride distance

Twelve O'clock

Reported bugs

11 issues
  • App freezes at loading requiring phone restart
  • Data deletion after app updates
  • Data loss on app crash
  • Graph display glitches after checkpoints
  • Photo checkpoint feature returns 'old photo not supported' error
Show 6 more
  • Beeping only works when phone not in silent mode
  • Sort function not working
  • Screenshot sharing produces blank page
  • Calculation errors showing ~150 second variance
  • Checkpoint history doesn't display correctly
  • Swiping left to delete checkpoints not intuitive

Requested features

18 requests
  • iCloud/cloud synchronization across devices
  • Notifications or reminders for checkpoints
  • Current time button on checkpoint screen
  • Larger buttons for 15/30/45 second marks
  • Power reserve tracking
Show 13 more
  • Wear frequency tracking
  • Average accuracy by watch position
  • Widget support
  • Atomic clock built into app
  • Regulator clock layout for time setting
  • In-app feedback option (instead of Twitter)
  • Automatic time reading from watch photos
  • 12-hour time format option
  • Sort function improvements
  • Year display in checkpoint history
  • Chrono24 account integration
  • Regular article updates
  • Export to Excel/CSV

In-app purchases

None

PRO TREK Connected

No in-app purchases

1 purchases

Twelve O'clock

One-time1
  • Twelve Plus$1.99

Questions

Is PRO TREK Connected free?
PRO TREK Connected is free to download, with no in-app purchases.
Is Twelve O'clock free?
Twelve O'clock is free to download, with in-app purchases available.
Which has better reviews, PRO TREK Connected or Twelve O'clock?
PRO TREK Connected is rated higher. PRO TREK Connected averages 4.6 out of 5 from 345 ratings, while Twelve O'clock averages 4.4 from 83 ratings.
Do PRO TREK Connected or Twelve O'clock have ads?
Neither PRO TREK Connected nor Twelve O'clock shows ads.
Which is updated more often, PRO TREK Connected or Twelve O'clock?
PRO TREK Connected ships an update every 2 months, and Twelve O'clock every 3 weeks. Most recently, PRO TREK Connected was updated on October 20, 2026 and Twelve O'clock on October 21, 2026.

Other comparisons