Comparison

LSTclock vs Binary Clock by jhale.dev

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

Head to head
About

LSTclock

This utility app displays local sidereal time for registered locations on iOS, iPadOS, and watchOS. It can also calculate sidereal time and Julian Date for any date and time, and sync locations between devices.

Highlights
  • Local sidereal time display
  • Julian Date calculation
  • Supports multiple registered locations
  • Location sync between iPhone and Apple Watch
  • Date and time specific calculations
Features
Read full description

LSTclock is an iOS/iPadOS/watchOS app that displays the local sidereal time (LST) at registered location(s). On iOS/iPadOS, it can also calculate LST and Julian Date for any date and time. The list of locations can be synced between iPhone and paired Apple Watch(es).

About

Binary Clock by jhale.dev

This utility displays time using binary code, representing numbers with illuminated dots. It offers personalization options and includes instructions for reading the binary time format. The application is open-source.

Highlights
  • Binary time display
  • Customizable settings
  • Instructions for binary time
  • Open-source code
  • Personalization options
Features
Read full description

Instead of the digits 1, 2, 3, etc... this clock uses columns of dots that turn on and off like the 1s and 0s of the binary form of the number. Binary Clock also includes several settings you can use to personalize the clock to your liking. Just press and hold the clock to access them. If you don't know how to tell time on a Binary Clock, check out the instructions in the blog post announcing the app: https://links.jhale.dev/binaryclock Binary Clock is open-source! Check out the code yourself on GitHub: https://github.com/thehale/BinaryClock DISCLAIMER: All marketing pictures in this app store listing are designed to complement the nerdy theme of this app. The presence of various books in some marketing pictures in this app store listing does not imply an endorsement of this app by the authors of those publications. Those authors retain copyright and trademark rights to their works.

Screenshots

LSTclock4 screens
Binary Clock by jhale.dev4 screens

Verdict

The call

The clearest difference is review sentiment: Binary Clock by jhale.dev at 100% against LSTclock's 55%. Binary Clock by jhale.dev also leads on rating (4.5 vs 3.8) and iOS requirement (15.1 vs 17.0). LSTclock's advantage is ratings volume (10 vs 2). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Binary Clock by jhale.dev holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: LSTclock has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 55% of LSTclock's written reviews are positive against 100% of Binary Clock by jhale.dev's.

UpkeepUpdate frequency

LSTclock ships an update every 2 months, Binary Clock by jhale.dev every 4 months. The most recent releases landed on September 9, 2026 and June 4, 2026 respectively.

Scorecard4 real differences · 6 level
LSTclock versus Binary Clock by jhale.dev: the parameters behind the verdict, then further details
ParameterLSTclockBinary Clock by jhale.dev
PriceFreeFree
Rating3.8 (10 ratings)4.5 (2 ratings) — better
Positive reviews54.5% of reviews100.0% of reviews — better
Number of ratings10 — better2
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size15 MB12 MB
Age rating4+4+
DeveloperTsuyoshi SawadaJoseph Hale

Customer experience

LSTclock

All ratings10 ratings
Positive60.0%
Neutral10.0%
Negative30.0%
Written reviews11 reviews
Positive54.5%
Neutral18.2%
Negative27.3%

Binary Clock by jhale.dev

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

LSTclock

No in-app purchases

None

Binary Clock by jhale.dev

No in-app purchases

Questions

Is LSTclock free?
LSTclock is free to download, with no in-app purchases.
Is Binary Clock by jhale.dev free?
Binary Clock by jhale.dev is free to download, with no in-app purchases.
Which has better reviews, LSTclock or Binary Clock by jhale.dev?
Binary Clock by jhale.dev is rated higher. LSTclock averages 3.8 out of 5 from 10 ratings, while Binary Clock by jhale.dev averages 4.5 from 2 ratings.
Do LSTclock or Binary Clock by jhale.dev have ads?
Neither LSTclock nor Binary Clock by jhale.dev shows ads.
Which is updated more often, LSTclock or Binary Clock by jhale.dev?
LSTclock ships an update every 2 months, and Binary Clock by jhale.dev every 4 months. Most recently, LSTclock was updated on September 9, 2026 and Binary Clock by jhale.dev on June 4, 2026.

Other comparisons