Comparison

Chronometer vs Tritium Connect

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

Head to head
About

Chronometer

Easily track your watch's accuracy against atomic time. Simply set your watch to atomic time, take a photo of the dial within the app, and record the difference. Analyze daily deviations over 15 days to assess your watch's performance.

Highlights
  • Track daily watch accuracy
  • Compare against atomic time
  • Photo capture for time reading
  • Altitude recording
  • Save data in CSV format
  • Analyze 15-day data trends
Read full description

Chronometer – Mechanical Watch Accuracy This app helps you track the real-world accuracy and long-term rate performance of your mechanical watch. It provides an easy way to measure the daily rate of your watch against an accurate NTP time reference and to follow its performance over days, weeks or months. Before starting a new measurement series, synchronize your watch with an accurate time reference. Do not reset the watch during the measurement period. An internet connection is required to obtain the precise NTP reference time. How to measure your watch 1. Start the app and wait until the NTP server has synchronized. The NTP time turns green when the reference time is available. 2. Point the camera at the watch dial. You can use pinch-to-zoom and, on supported devices, the macro capability for precise reading of the seconds hand. 3. Tap the camera button to freeze the image. The app records the corresponding NTP reference time. 4. Read the exact time from the frozen image and adjust the displayed watch time using the picker wheels. 5. If desired, enter the current altitude above sea level. 6. Tap Save Rate to store the measurement. 7. Tap the camera button again to return to the live camera view. For the best results, measure your watch once per day at approximately the same time. If more than one day passes between two measurements, the app automatically calculates the average daily rate for that interval. Performance evaluation The graph shows the daily rate of your watch together with the standard COSC limits and the more demanding COSC Excellence limits. After at least 15 measurements, the app provides an additional COSC Evaluation based on the most recent 15 daily rate values. The evaluation includes a COSC pass/fail assessment and a Concours Score from 0 to 500 points, derived from the chronometer competition formula. The Concours Score does not include the thermal coefficient (CT). Temperature testing, controlled positional changes, magnetic exposure and shock testing cannot be reproduced during normal everyday use. The result is therefore not an official COSC certification, but a practical evaluation of the real-world rate performance of your watch. The complete measurement history can be exported as a CSV file for further analysis. The exported data includes the date, absolute rate difference, daily rate difference and altitude above sea level. Time reference: Swiss NTP server ntp11.metas.ch The app also includes a COSC NTP 4 Hz reference dial for calibration and verification of optical timing instruments. Requires iOS 18.6 or later.

About

Tritium Connect

Features
Read full description

Tritium Connect is the companion app for all Engineered Arts' Gen 3 humanoid robots. Pair with your robot and manage Wi-Fi and wired network settings. Get your robot connected quickly and securely. Everything you need, in one place.

Screenshots

Chronometer3 screens
Tritium Connect4 screens

Verdict

The call

The clearest difference is price: Tritium Connect at Free against Chronometer's $2.99. Tritium Connect also leads on update cadence (every 5 days vs every 5 months). On ads, in-app purchases, 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

CostPrice · In-app purchases · Ads · Monetization

Tritium Connect is free to download; Chronometer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Chronometer ships an update every 5 months, Tritium Connect every 5 days. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
Chronometer versus Tritium Connect: the parameters behind the verdict, then further details
ParameterChronometerTritium Connect
Price$2.99Free — better
Rating3.1 (8 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings8 — better—
Update frequencyEvery 5 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.618.0 — better
Further details — not scored
Size3 MB100 MB
Age rating4+17+
DeveloperKilian EiseneggerEngineered Arts Ltd.

In-app purchases

None

Chronometer

No in-app purchases

None

Tritium Connect

No in-app purchases

Questions

Is Chronometer free?
Chronometer costs $2.99, with no in-app purchases.
Is Tritium Connect free?
Tritium Connect is free to download, with no in-app purchases.
Do Chronometer or Tritium Connect have ads?
Neither Chronometer nor Tritium Connect shows ads.
Which is updated more often, Chronometer or Tritium Connect?
Chronometer ships an update every 5 months, and Tritium Connect every 5 days. Most recently, Chronometer was updated on October 18, 2026 and Tritium Connect on October 12, 2026.

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