Comparison

Emerald Chronometer vs NTP Candle Timer

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

Head to head
About

Emerald Chronometer

Experience highly detailed mechanical watch faces with advanced astronomical and clock complications. Track celestial events, manage time with precision, and explore historical and future dates with interactive displays. Optimized for iPhone and iPod touch.

Highlights
  • Accurate astronomical data (4000 BCE - 2800 CE)
  • Sun, Moon, and planet rise/set times
  • Mechanical display of Moon phases
  • Precise local and UTC time
  • Chronograph with split timer
  • World-time and calendar watches
  • Interactive time-travel simulation
Read full description

These models of high-end mechanical watch faces contain many of the most complex "complications" found in real watches, plus refinements found nowhere else. All displays maintain the look and feel of real mechanical objects, but with the time and location accuracy of the iPhone. NOTE: This app (Emerald Chronometer) is optimized for the iPhone and iPod touch. Please also see Emerald Chronometer HD, a separate product optimized for the iPad. Astronomy features: - Highly accurate data from 4000 BCE to 2800 CE - Times of rise and set for the Sun, the Moon, and the 5 classical planets - The correct shape and orientation of the Moon in all phases but still using a mechanical display - Relative positions of the Sun, Moon, 6 planets and the constellations of the zodiac - "Compass functions" show the elevation and azimuth of the Sun, the Moon, and the 5 planets - The Equation of Time, solar time and sidereal time - Eclipse predictor (lunar node indicators and separation indicator) - User settable geographic location and timezone using an 80,000 city database - A unique face showing the rise and set times of all 5 classical planets plus the Sun and the Moon at once Clock features: - Day/date/month/year indicators, using mechanical wheels - Local and UTC time - Chronograph (stopwatch) with split timer, 1/10 sec accuracy - Alarm clock and interval timer; notifications are delivered in iOS 4 if the app is not running** - World-time watch with 24-city ring on one side and 4 subdials on the other - Calendar watch with rotating wheels showing a full month at a time - Most watches with 1/5 sec or 1/10 sec precision - Synchronized with standard atomic clocks via NTP There are 16 watches in all, with 27 total watch faces (including front and back sides). A setting is available to allow the display to stay on only when plugged in. Play with the watches by tapping on the crown and moving the hands, or press and hold on a date window to zoom through time to see the effect on the heavens. Then just use them to show you when it's time for a break. A complete description of each application feature can be found in the built-in Help screens and on the Emerald Sequoia LLC Web Site, which also includes a demo movie. A developer's blog may also be found at http://emeraldsequoia.com/esblog/ . If you are having any trouble with the application whatsoever, please see our FAQ on the support page listed below and then contact us through that page if your problem is not resolved. We take pride in responding promptly to all support email requests. **NTP accuracy is not guaranteed for alarm delivery if the app is not running. (NTP requires Internet access. Like all apps Emerald Chronometer can not change the device's internal clock.)

About

NTP Candle Timer

Read full description

A clear candle countdown beside your charts. NTP Candle Timer is a timing utility for stock, futures, forex and crypto traders. Watch the time remaining in a repeating interval without covering your trading platform. NETWORK-TIME SYNC The app periodically compares device time with network time and applies the measured offset to its display. The final 15 seconds show hundredths of a second. Actual accuracy can vary with the network, device and your trading platform's time source. The app does not change your device clock. YOUR INTERVAL, YOUR DISPLAY Choose 1, 3, 5, 15, 30 or 60 minutes. Use landscape or portrait orientation, select a font and color, and optionally show the battery indicator. AN OPTIONAL REFERENCE CLOCK Display Local, New York or UTC time below the countdown. New York follows daylight saving time automatically. This option is off by default and does not change the countdown or the timezone of your market alerts. VISUAL AND SOUND ALERTS Choose warning colors, final-seconds sounds and a session-end sound. Set market open and close reminders in your device's local time. Keep the app open during your session; it is not a background alarm service. The core timer and reference clock are free with banner advertising. An optional auto-renewable subscription removes banner ads and unlocks Pulse and Afterglow visual effects. The app interface supports English, Korean, Japanese, Spanish, Portuguese, German and French, following your device language preferences. Other languages fall back to English. NTP Candle Timer does not provide prices, trading signals, brokerage services or financial advice. Verify critical timing with your trading platform. Payment is charged to your Apple Account at purchase confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel subscriptions in your Apple Account settings. Privacy Policy: https://jddev-apps.web.app/ntp-candle-timer/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://jddev-apps.web.app/ntp-candle-timer/support

Screenshots

Emerald Chronometer4 screens
NTP Candle Timer4 screens

Verdict

The call

The clearest difference is in-app purchases: Emerald Chronometer at none against NTP Candle Timer's 2. NTP Candle Timer's advantage is update cadence (weekly vs every 22 months). On price, 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

Both are free to download. NTP Candle Timer sells 2 in-app purchases, starting at $0.99 per month. Emerald Chronometer asks for nothing beyond the download.

UpkeepUpdate frequency

Emerald Chronometer ships an update every 22 months, NTP Candle Timer weekly. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
Emerald Chronometer versus NTP Candle Timer: the parameters behind the verdict, then further details
ParameterEmerald ChronometerNTP Candle Timer
PriceFreeFree
Rating4.9 (105 ratings) — better—
Positive reviews96.8% of reviews—
Number of ratings105 — better—
Update frequencyEvery 22 monthsWeekly — better
Ads—Yes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size311 MB44 MB
Age rating4+4+
DeveloperScapa Flow, LLCDong Hyeon Ji

In-app purchases

None

Emerald Chronometer

No in-app purchases

2 purchases

NTP Candle Timer

Subscriptions2
  • Premium - Monthly$0.991 Month
  • Premium - Yearly$7.991 Year

Questions

Is Emerald Chronometer free?
Emerald Chronometer is free to download, with no in-app purchases.
Is NTP Candle Timer free?
NTP Candle Timer is free to download, with in-app purchases available.
Which is updated more often, Emerald Chronometer or NTP Candle Timer?
Emerald Chronometer ships an update every 22 months, and NTP Candle Timer weekly. Most recently, Emerald Chronometer was updated on October 6, 2026 and NTP Candle Timer on October 5, 2026.

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