Comparison

Local Sidereal Time vs Let's Sync

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

Head to head
About

Local Sidereal Time

This app calculates local sidereal time, a system astronomers use to locate celestial objects. It can also be used for personal development, with studies suggesting increased psychic abilities during specific sidereal times. The pro version offers advanced features like notifications and map-based calculations.

Highlights
  • Calculate local sidereal time
  • Astronomy celestial object location
  • Potential psychic ability enhancement
  • Pro version notifications
  • Pro version map-based calculation
  • Pro version date/time conversion
Features
Read full description

Sidereal helps you track local sidereal time from your current location or any place you want to check. It is designed for people interested in the 13:30 LST window discussed in remote-viewing literature, while also supporting any custom sidereal target you want to follow. Use Sidereal to: View a live local sidereal clock based on your current location Calculate local sidereal time manually from longitude, date, and time Search for a city or address and see the result with map support Generate the next 31 upcoming hits for your selected sidereal target Schedule the next 30 days of on-device alerts Export future times to CSV and export events to your calendar Customize your target LST, alert timing, full-window notifications, night viewing, and map visibility Sidereal starts with 13:30 LST as the default target, but you can change it in Settings to track any local sidereal time. The app includes a trial, with Pro unlocking continued access to advanced tools and planning features.

About

Let's Sync

Synchronize audio across multiple smartphones for shared listening experiences. Create events for silent dances, interactive stories, group workouts, and more. It's a versatile platform for personal and business use, supporting thousands of concurrent participants.

Highlights
  • Synchronizes audio across multiple smartphones
  • Creates shared listening events
  • Supports silent dances and interactive stories
  • Enables group workouts and worldwide events
  • Platform for unique business ventures
  • Supports up to 7,000 concurrent participants
Features
Read full description

Let’s Sync synchronizes audio across multiple smartphones. It is used to create events in which multiple participants hear the audio from their phones at the same time. Let's Sync creates the following types of events Silent Dances in Nature Story Foolery Interactive Stories Story Dating Events Story Gatherings Interactive Story Telling Toys Multilevel Yoga Classes Worldwide Events Sync your favourite playlist with your friends while running, biking and skiing. Let's Sync has many uses and is only limited to your imagination. What will you create? Let’s Sync is free to use and can support up to 7,000 concurrent participants, more with advanced notices. Let’s Sync synchronizes audio across smartphones. It works anywhere where there is internet connection. Let’s Sync can be a platform for your own unique business. Lead your own ecstatic dance events in nature, raise money for your favorite causes, teach simultaneous multi-level yoga classes, or create content for others to use and get paid every time they do. What will you create?

Screenshots

Local Sidereal Time4 screens
Let's Sync4 screens

Verdict

The call

The clearest difference is update cadence: Let's Sync at monthly against Local Sidereal Time's every 4 months. Let's Sync also leads on iOS requirement (13.0 vs 15.0). On price, review sentiment, 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. Local Sidereal Time sells 1 one-off in-app purchase and Let's Sync sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Local Sidereal Time ships an update every 4 months, Let's Sync monthly. The most recent releases landed on September 30, 2026 and June 1, 2026 respectively.

Scorecard2 real differences · 8 level
Local Sidereal Time versus Let's Sync: the parameters behind the verdict, then further details
ParameterLocal Sidereal TimeLet's Sync
PriceFreeFree
Rating4.7 (1.1K ratings) — better—
Positive reviews70.7% of reviews — better66.7% of reviews
Number of ratings1.1K — better—
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size20 MB92 MB
Age rating4+12+
DeveloperScott SpillerTerra Virgo Corporation

Customer experience

Local Sidereal Time

All ratings1,032 ratings
Positive92.8%
Neutral3.6%
Negative3.6%
Written reviews41 reviews
Positive70.7%
Neutral4.9%
Negative24.4%

Let's Sync

Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Bugs and requests

Local Sidereal Time

Reported bugs

4 issues
  • Alarm doesn't work
  • Crashes when loading
  • Notification issues
  • Pro purchase restoration not working

Requested features

4 requests
  • Add alarm feature
  • Allow setting location manually
  • Improve notification handling
  • Automatically adjust for daylight saving time

Let's Sync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Local Sidereal Time

One-time1
  • Pro$4.99
10 purchases

Let's Sync

One-time10
  • Add 5 credits to wallet$4.99
  • Add 21 credits to wallet$20.99
  • Add 22 credits to wallet$21.99
Show 7 more
  • Add 23 credits to wallet$22.99
  • Add 24 credits to wallet$23.99
  • Add 25 credits to wallet$24.99
  • Add 26 credits to wallet$25.99
  • Add 27 credits to wallet$26.99
  • Add 28 credits to wallet$27.99
  • Add 29 credits to wallet$28.99

Questions

Is Local Sidereal Time free?
Local Sidereal Time is free to download, with in-app purchases available.
Is Let's Sync free?
Let's Sync is free to download, with in-app purchases available.
Do Local Sidereal Time or Let's Sync have ads?
Neither Local Sidereal Time nor Let's Sync shows ads.
Which is updated more often, Local Sidereal Time or Let's Sync?
Local Sidereal Time ships an update every 4 months, and Let's Sync monthly. Most recently, Local Sidereal Time was updated on September 30, 2026 and Let's Sync on June 1, 2026.

Other comparisons