Comparison

ChronoLog vs PECRON

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

Head to head
About

ChronoLog

This app provides professional-grade tools to track the accuracy of mechanical watches. It offers audio timegraphing, photo offset measurement, and tap timing, along with detailed analytics and atomic time synchronization for collectors and enthusiasts.

Highlights
  • Audio timegrapher for rate, beat error, and amplitude
  • Photo offset measurement against atomic time
  • Tap timing for quick offset logging
  • Track accuracy trends over time
  • Atomic time synchronization
  • Detailed performance graphs and analytics
  • Manage and organize watch collection
Features
Read full description

ChronoLog — Timegrapher, Watch Accuracy Tracker & Collection Log Turn your iPhone into a timegrapher. ChronoLog listens to your mechanical watch through the microphone and reads its rate in seconds per day — then keeps measuring over days and weeks, on your wrist, so you know how the watch really runs, not just how it ran on the bench. No subscription. No account. One-time purchase unlocks everything. AUDIO TIMEGRAPHER • Rate in seconds per day from your watch's tick, in about 30 seconds — the same number a timegrapher gives you. • Every reading carries a confidence score, so you know when to trust it and when to record again. • Movements from 18,000 to 36,000 bph, detected automatically or set per watch. ACCURACY OVER TIME — THE PART A TIMEGRAPHER CAN'T DO A bench reading captures one moment. ChronoLog logs every measurement into timing runs and charts the daily rate as you actually wear the watch: watch it drift, catch magnetization, and see when it needs regulation or a service — before it costs you minutes a week. • Photo offset: photograph the dial against atomic time for the most precise manual reading. • Tap timing: tap on the second for a quick log with any watch, quartz included. • Tag measurements by position, temperature or activity to learn what moves the rate. ACCURACY REPORT — NEW A health score for every watch, timekeeping trends per run, and an anonymous comparison against the same models worldwide — find out whether your Submariner or your SKX keeps time better than most. Share a private report link that expires on its own. ATOMIC TIME Every measurement is referenced to NTP atomic time, not your phone's clock. Use the live atomic clock, with an optional seconds tick, to set your watches to the second. YOUR COLLECTION, ORGANISED • Unlimited watches with photos, brand, model, calibre, serial number, service history and notes. • Wear log: swipe to mark what you're wearing, then see your rotation as a calendar, timeline and stats. • Moon phase: last and next full moon with the days between — set a moonphase complication in seconds. • Full backup and restore. CSV export for your records or your watchmaker. WHY COLLECTORS CHOOSE CHRONOLOG A timegrapher is for adjusting a watch. ChronoLog is for knowing it — clean, fast, ad-free, built by a collector in Boulder, Colorado, who reads and answers every review. Download ChronoLog and find out how your watches really run.

About

PECRON

Easily connect and manage your compatible portable power stations and solar devices. Monitor real-time energy data, control functions remotely, and set up automations. Share device access with others and receive important notifications.

Highlights
  • Connect and manage devices
  • Real-time battery and energy monitoring
  • Remote device function control
  • Create shortcuts and automations
  • Share device access
  • Receive device notifications
  • Firmware upgrades
Features
Read full description

Brand New PECRON APP PECRON helps you connect and manage compatible PECRON portable power stations and solar power devices. With the app, you can: - Add devices by scanning a QR code, serial number, Wi-Fi or Bluetooth setup. - View real-time battery level, device status, input/output power and energy data. - Control supported device functions from your phone. - Create shortcuts and automations for common device actions. - Share devices with family members or team members. - Receive device messages and notifications. - Check firmware upgrade options and keep devices up to date. - Submit support requests with product photos, proof of purchase and issue details. PECRON is designed for home backup, camping, outdoor work and off-grid power users who want a simple way to see and manage their energy devices whenever a supported connection is available. Feature availability may vary by device model, firmware version, region and network conditions.

Screenshots

ChronoLog4 screens
PECRON4 screens

Verdict

The call

The clearest difference is rating: ChronoLog at 4.6 against PECRON's 3.1. ChronoLog also leads on review sentiment (85% vs 43%) and ratings volume (238 vs 25). PECRON's advantage is in-app purchases (none vs 2). 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. ChronoLog sells 2 one-off in-app purchases. PECRON asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ChronoLog holds the better App Store score, 4.6 against 3.1. That said, the two scores are not equally well evidenced: ChronoLog has 238 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 85% of ChronoLog's written reviews are positive against 43% of PECRON's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

Scorecard5 real differences · 5 level
ChronoLog versus PECRON: the parameters behind the verdict, then further details
ParameterChronoLogPECRON
PriceFreeFree
Rating4.6 (238 ratings) — better3.1 (25 ratings)
Positive reviews85.0% of reviews — better42.9% of reviews
Number of ratings238 — better25
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size50 MB23 MB
Age rating4+4+
Developertyler woodShenzhen pecron Technology Co.,Ltd

Customer experience

ChronoLog

All ratings230 ratings
Positive90.4%
Neutral2.6%
Negative7.0%
Written reviews100 reviews
Positive85.0%
Neutral9.0%
Negative6.0%

PECRON

All ratings23 ratings
Positive47.8%
Neutral0.0%
Negative52.2%
Written reviews14 reviews
Positive42.9%
Neutral0.0%
Negative57.1%

In-app purchases

2 purchases

ChronoLog

One-time2
  • Premium$5.99
  • Premium$6.99
None

PECRON

No in-app purchases

Questions

Is ChronoLog free?
ChronoLog is free to download, with in-app purchases available.
Is PECRON free?
PECRON is free to download, with no in-app purchases.
Which has better reviews, ChronoLog or PECRON?
ChronoLog is rated higher. ChronoLog averages 4.6 out of 5 from 238 ratings, while PECRON averages 3.1 from 25 ratings.
Do ChronoLog or PECRON have ads?
Neither ChronoLog nor PECRON shows ads.
Which is updated more often, ChronoLog or PECRON?
ChronoLog ships an update every 3 weeks, and PECRON every 3 weeks. Most recently, ChronoLog was updated on November 7, 2026 and PECRON on November 9, 2026.

Other comparisons