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.
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.
- 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
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | Local Sidereal Time | Let's Sync |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.1K ratings) — better | — |
| Positive reviews | 70.7% of reviews — better | 66.7% of reviews |
| Number of ratings | 1.1K — better | — |
| Update frequency | Every 4 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 92 MB |
| Age rating | 4+ | 12+ |
| Developer | Scott Spiller | Terra Virgo Corporation |
Customer experience
Local Sidereal Time
Let's Sync
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
Local Sidereal Time
- Pro$4.99
Let's Sync
- Add 5 credits to wallet$4.99
- Add 21 credits to wallet$20.99
- Add 22 credits to wallet$21.99
Show 7 moreShow fewer
- 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?
Is Let's Sync free?
Do Local Sidereal Time or Let's Sync have ads?
Which is updated more often, Local Sidereal Time or Let's Sync?
Other comparisons















