Comparison

Ratekeeper vs Transtec

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

Head to head
About

Ratekeeper

Measure the daily accuracy of your mechanical watch without specialized equipment. Simply tap when your watch's second hand aligns with true time, and the app calculates its rate. Track historical data, compare against specifications, and analyze performance by resting position.

Highlights
  • Measures watch rate in seconds per day
  • Historical data tracking and charting
  • Comparison against specified accuracy bands
  • Analysis of rate by resting position
  • Standalone true-time reference clock
  • Export readings to CSV
Features
Read full description

Every mechanical watch has a rate: a few seconds gained or lost each day, as personal to the movement as a fingerprint. Ratekeeper tells you what yours is, exactly, without a timing machine or a trip to the watchmaker. The method is a five-second pleasure. Set your watch to true time. A day or two later, tap the screen the instant the second hand crosses twelve. Ratekeeper compares that tap to atomic network time (accurate to hundredths of a second) and, from two readings, works out the watch's rate in seconds per day. Gaining or losing, and by exactly how much. That's the whole thing. No microphone, no cradle, no gear. Just your watch, your phone, and a tap. WHAT YOU SEE • The rate, plainly. "+5.4 spd". In words, "gains 5.4 seconds a day," so the sign never has to be decoded. • A history that reads like a story. Every reading is grouped into runs (a run begins each time you set the watch) and charted so you can watch a rate settle in as a fresh service beds down, or drift as it comes due for one. • Against a band, if you want one. Hold a watch to −4/+6 seconds a day, or the tighter 0/+5, and see at a glance whether it's keeping to spec. • By resting position. Dial up, crown down, on the wrist: a mechanical watch runs differently in each. Ratekeeper breaks the rate down position by position and even suggests how to rest it tonight to bring it closer to true. • A true-time reference clock. A standalone screen showing network time to the tenth of a second, so you can set any watch against it. BUILT FOR PEOPLE WHO CARE ABOUT WATCHES • Manual, automatic, quartz, or something else: each is measured on its own terms. • Gentle reminders on your rhythm, so readings land a few days apart the way the math wants. • Export every reading to CSV whenever you like. The data is yours to keep. PRIVATE BY DEFAULT No account. No sign-up. No ads. Your watches and readings live on your device and sync across your own devices through your own private iCloud. We can't see them, and nobody is building a profile out of your collection. Find out how your watches really run. Every one of them has a rate. This is how you learn it. Have questions? We're here to help. Email us at hello@slowsundaysoftware.com Terms of Use: https://slowsundaysoftware.com/terms Privacy Policy: https://slowsundaysoftware.com/privacy

About

Transtec

Read full description

An easy-to-use guide to determine what transmission is in your vehicle.

Screenshots

Ratekeeper4 screens
Transtec4 screens

Verdict

The call

The clearest difference is in-app purchases: Transtec at none against Ratekeeper's 1. Transtec also leads on iOS requirement (16.0 vs 26.5). On price, update cadence, 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. Ratekeeper sells 1 one-off in-app purchase. Transtec asks for nothing beyond the download.

UpkeepUpdate frequency

Ratekeeper ships an update every 3 days, Transtec every 2 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
Ratekeeper versus Transtec: the parameters behind the verdict, then further details
ParameterRatekeeperTranstec
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS26.516.0 — better
Further details — not scored
Size7 MB3 MB
Age rating4+4+
DeveloperSlow Sunday Software LLCKonvert, LLC.

In-app purchases

1 purchases

Ratekeeper

One-time1
  • Unlock the entire app$4.99
None

Transtec

No in-app purchases

Questions

Is Ratekeeper free?
Ratekeeper is free to download, with in-app purchases available.
Is Transtec free?
Transtec is free to download, with no in-app purchases.
Do Ratekeeper or Transtec have ads?
Neither Ratekeeper nor Transtec shows ads.
Which is updated more often, Ratekeeper or Transtec?
Ratekeeper ships an update every 3 days, and Transtec every 2 days. Most recently, Ratekeeper was updated on October 7, 2026 and Transtec on October 9, 2026.

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