Comparison

ChronoSync vs Lux Light Meter

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

Head to head
About

ChronoSync

Features
Read full description

Set your mechanical watch to the second. Pull the crown. Watch the countdown. The phone taps in your hand at zero, so your eyes never have to leave the dial. No mental arithmetic, no settling for close enough. Then there are the other four faces. A GMT that tracks a second timezone, a dive bezel you can actually rotate, a chronograph that runs, a moonphase that knows what tonight looks like. Each one comes with a short guide to what the complication does and how to use it — the parts a watch manual assumes you already know. What's inside A countdown to the exact second, with a tap in your hand at zero Five faces: Day-Date, GMT, Moonphase, Dive, Chronograph Controls that behave like the real thing — pick a second timezone, turn the bezel, run the chronograph Plain-language guides to every complication, including how to set a date without hurting the movement A Home Screen widget in the same style, that opens straight to the face you tapped No account, no analytics, nothing to sign up for. Go set your watch. Then stop thinking about it.

About

Lux Light Meter

Measure ambient light levels with your iPhone. Get real-time lux and foot-candle readings, with specialized modes for photography and plant care. Track light history and calibrate for accuracy.

Highlights
  • Ambient light metering (lux/fc)
  • Photography exposure suggestions
  • Plant light (PPFD/DLI) estimation
  • Continuous measurement and history
  • Optional meter calibration
  • Privacy-friendly local storage
Features
Read full description

Lux Light Meter: Illuminance A practical lux and illuminance meter for iPhone. Measure ambient light in seconds, check if a room is bright enough for study, work, or home use, and get helpful exposure and plant-lighting guidance when you need it. Core metering works offline. Key Features: Ambient light metering - Live lux / fc readings with scene targets that tell you if the light is too dim, about right, or too bright — plus simple tips to adjust Photography mode (Pro) - Aperture- or shutter-priority suggestions with ISO and exposure compensation so you can dial in exposure faster Plant mode (Pro) - Estimate PPFD and DLI for common houseplants, with light source and daily photoperiod options Continuous measure & history - Save single readings, track how light changes over time, and review min, average, and max values Optional calibration - Fine-tune against a trusted meter; Pro saves separate factors for the front and rear cameras Units & privacy-friendly storage - Switch between lux and fc; your measurements stay on your device How to Use: Open the app, allow camera access, and point your iPhone at the area you want to measure. Switch between Environment, Photography, and Plant modes, then save a reading or run a continuous measurement when you need a longer sample. Subscription Options: * Weekly and yearly subscriptions, plus a lifetime purchase * Payment will be charged to your Apple ID account * Subscriptions renew automatically within 24 hours before the current period ends * Manage or cancel anytime in your Account Settings Clearer readings. Better light decisions. Terms of Use: https://lightmeter.xzonesoft.com/terms.html Privacy Policy: https://lightmeter.xzonesoft.com/privacy.html Contact Us: support@xzonesoft.com

Screenshots

ChronoSync4 screens
Lux Light Meter3 screens

Verdict

The call

The clearest difference is in-app purchases: ChronoSync at none against Lux Light Meter's 3. Lux Light Meter's advantage is update cadence (fortnightly vs every 3 months) and iOS requirement (17 vs 26.0). 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. Lux Light Meter sells 3 in-app purchases, starting at $1.99 per 7 days. ChronoSync asks for nothing beyond the download.

UpkeepUpdate frequency

ChronoSync ships an update every 3 months, Lux Light Meter fortnightly. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
ChronoSync versus Lux Light Meter: the parameters behind the verdict, then further details
ParameterChronoSyncLux Light Meter
PriceFreeFree
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017 — better
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperDominic McPhee灿耿 陈

In-app purchases

None

ChronoSync

No in-app purchases

3 purchases

Lux Light Meter

Subscriptions2
  • Weekly Access$1.997 Days
  • Annual Subscription$7.991 Year
One-time1
  • Lifetime Access$4.99

Questions

Is ChronoSync free?
ChronoSync is free to download, with no in-app purchases.
Is Lux Light Meter free?
Lux Light Meter is free to download, with in-app purchases available.
Do ChronoSync or Lux Light Meter have ads?
Neither ChronoSync nor Lux Light Meter shows ads.
Which is updated more often, ChronoSync or Lux Light Meter?
ChronoSync ships an update every 3 months, and Lux Light Meter fortnightly. Most recently, ChronoSync was updated on October 4, 2026 and Lux Light Meter on October 8, 2026.

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