Comparison

Flat Earth Sun, Moon & Zodiac vs HemiSync

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

Head to head
About

Flat Earth Sun, Moon & Zodiac

Explore celestial mechanics from an alternative perspective, tracking the sun and moon's positions on an AE map. Connect with like-minded users, access educational content, and discover flat earth-related books and products. Features include time-lapse views, a world compass, and local weather data.

Highlights
  • Sun and moon position tracking on AE map
  • Daily educational video content
  • Connect with users worldwide
  • Zodiac Star Wheel for astrological cycles
  • Flat earth-related books and products
  • Time-lapse of sun and moon movements
  • World Compass visualization
Features
Currently charting
Read full description

Flat Earth Sun & Moon Clock: A Conceptual Exploration of Time, Sky, and Seasons The Flat Earth Sun & Moon Clock lets you track the sun and moon's positions across the AE (Azimuthal Equidistant) map. Observe the rhythm of day and night, and watch the sun’s 28-day cycle lap the moon. Explore seasonal changes as the sun moves between the Tropic of Capricorn and Cancer, and gain insights into celestial mechanics from an alternative perspective. Key Features:  • Friend Finder:  • Featured Video: Daily educational content on the sky clock, with an archive to revisit past videos. • Connect with like-minded users worldwide. Share your location or keep it private, with options for messaging, group chats, voice, and video calls. (Outgoing calls and messages requires one time yearly app subscription) 
• Match Maker: Find a special like-minded someone within your selected radius.
 • Meetup Maker: Create or join local meetups and receive notifications for new events.
 • Messaging: Exchange 1-on-1 messages or join groups that include video chats (requires one time app yearly subscription).
 • Zodiac Star Wheel: Track sun and moon positions through astrological cycles.
 • Books: Explore flat earth-related books for all ages, from new works to classics.
 • Homeschool Links: Curated content for homeschooling families, including memberships to private social media groups.
 • Time-lapse: Watch sun and moon movements and see day-night cycle changes, especially during equinoxes.
 • Customizable Backgrounds: Choose from Antarctica, high-altitude balloon shots, or ocean vistas, or upload your own.
 • World Compass: Visualize how circumnavigation on a flat Earth model actually works.
 • Analog Clock: Track the sun and moon with an analog clock showing day and night cycles.
 • Local Weather: Get daily weather, temperature, and sunrise/sunset times (ad-free, detailed forecast requires one time app yearly subscription). 
• World Weather on AE Map: Real-time weather data, including wind patterns and magnetic flux lines, compared to the globe model.
 • Sunrise & Sunset & Moon Phase Percentage: Includes daylight savings, 12/24-hour clock, and language options.
 • Shopping: Browse flat earth-related products, books, and community-created items. Additional Features:  • Multi-language videos and content
• Censorship-free video search (requires one time app yearly subscription)
 • Flat earth images and gifs (search images feature requires one time app yearly subscription)
 • World time in any location 
• Countdown timer for upcoming events
 • Referral feature to invite friends and earn $DOME crypto currency
 • Delete account and all records anytime via Friend Finder log out or settings. Subscription Information: 
A one time all inclusive yearly subscription of $10.99 USD unlocks ALL premium features, including profiles, messaging, calls, Match Maker, meetup creation, uncensored video/image search, detailed weather services, and future feature updates. Compatibility:
 • Requires iOS 14.0 or later
 • Compatible with iPhone 6 or later For more details, review our Terms & Conditions and Privacy Policy.

About

HemiSync

This app generates binaural beats and isochronic tones to aid in meditation and relaxation. Explore various sound frequencies and pre-set combinations for personal wellness routines, with customizable timers and controls.

Highlights
  • Binaural beat and isochronic tone generation
  • Customizable frequency ranges (Delta, Theta, Alpha, Beta, Gamma)
  • Pre-configured audio presets
  • Session timer functionality
  • Solfeggio frequency options
Features
Read full description

Explore Audio Frequency Meditation HemiSync is an audio frequency generator that creates binaural beats and isochronic tones for meditation and relaxation practice. The app allows you to experiment with different sound frequencies that some users find helpful for their personal wellness routines. What This App Does: Generates customizable audio tones and beats Offers preset frequency combinations based on popular meditation practices Provides session timers and audio controls Includes binaural beat and isochronic tone generation modes Features: Frequency range selection (Delta, Theta, Alpha, Beta, Gamma) Adjustable beat frequencies and carrier tones Pre-configured audio presets Session timer functionality Solfeggio frequency options (396Hz, 417Hz, 432Hz) Please Note: This app is for entertainment and personal exploration purposes. It generates audio tones based on concepts from audio meditation practices. Any effects experienced are subjective and individual. Privacy Policy - https://enginezero.tech/app-privacy-policy/ Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flat Earth Sun, Moon & Zodiac4 screens
HemiSync4 screens

Verdict

The call

The clearest difference is price: HemiSync at Free against Flat Earth Sun, Moon & Zodiac's $5.99. HemiSync also leads on review sentiment (100% vs 74%). Flat Earth Sun, Moon & Zodiac's advantage is rating (4.7 vs 3.6) and ratings volume (2.2K vs 11). On update cadence, ads, in-app purchases and monetization model 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

HemiSync is free to download; Flat Earth Sun, Moon & Zodiac costs $5.99 up front. Flat Earth Sun, Moon & Zodiac sells 2 in-app purchases, starting at $0.99 per month and HemiSync sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Flat Earth Sun, Moon & Zodiac holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: Flat Earth Sun, Moon & Zodiac has 2.2K ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 74% of Flat Earth Sun, Moon & Zodiac's written reviews are positive against 100% of HemiSync's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Flat Earth Sun, Moon & Zodiac ships an update every 4 weeks, HemiSync every 5 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 5 level
Flat Earth Sun, Moon & Zodiac versus HemiSync: the parameters behind the verdict, then further details
ParameterFlat Earth Sun, Moon & ZodiacHemiSync
Price$5.99Free — better
Rating4.7 (2.2K ratings) — better3.6 (11 ratings)
Positive reviews74.4% of reviews100.0% of reviews — better
Number of ratings2.2K — better11
Update frequencyEvery 4 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#59 — better—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better18.4
Further details — not scored
Size311 MB61 MB
Age rating17+4+
DeveloperBlue Water BayEngineZero

Customer experience

Flat Earth Sun, Moon & Zodiac

All ratings2,225 ratings
Positive92.9%
Neutral1.2%
Negative5.9%
Written reviews367 reviews
Positive74.4%
Neutral4.4%
Negative21.3%

HemiSync

All ratings9 ratings
Positive77.8%
Neutral22.2%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Flat Earth Sun, Moon & Zodiac

Reported bugs

4 issues
  • Clock not displaying the correct time
  • Subscription issues and inability to access paid features
  • Compatibility problems with newer iOS devices
  • Frequent app crashes and freezes

Requested features

5 requests
  • Ability to use the clock as a home screen or wallpaper
  • Improved compass functionality
  • Portrait mode support
  • Constellation map integration
  • Ability to track sun/moon positions more accurately

HemiSync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Flat Earth Sun, Moon & Zodiac

Subscriptions2
  • Monthly Subscriptions$0.991 Month
  • Yearly Subscriptions$10.991 Year
1 purchases

HemiSync

Subscriptions1
  • Premium$0.991 Month

Questions

Is Flat Earth Sun, Moon & Zodiac free?
Flat Earth Sun, Moon & Zodiac costs $5.99, and also offers in-app purchases.
Is HemiSync free?
HemiSync is free to download, with in-app purchases available.
Which has better reviews, Flat Earth Sun, Moon & Zodiac or HemiSync?
Flat Earth Sun, Moon & Zodiac is rated higher. Flat Earth Sun, Moon & Zodiac averages 4.7 out of 5 from 2.2K ratings, while HemiSync averages 3.6 from 11 ratings.
Do Flat Earth Sun, Moon & Zodiac or HemiSync have ads?
Neither Flat Earth Sun, Moon & Zodiac nor HemiSync shows ads.
Which is updated more often, Flat Earth Sun, Moon & Zodiac or HemiSync?
Flat Earth Sun, Moon & Zodiac ships an update every 4 weeks, and HemiSync every 5 weeks. Most recently, Flat Earth Sun, Moon & Zodiac was updated on November 6, 2026 and HemiSync on November 5, 2026.

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