Comparison

Sync Hemispheres vs CleanQuest

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

Head to head
About

Sync Hemispheres

Explore altered mental states through controlled brainwave stimulation. This app uses binaural beats and ambient sounds to help you achieve deeper rest, enhanced focus, and explore dream states. Customize your experience with adjustable brainwave frequencies and timed transitions.

Highlights
  • Binaural beat generation
  • Adjustable brainwave frequencies
  • Timed brainwave transitions
  • Ambient soundscapes
  • Brainwave state presets
  • Binaural beats and ambient sound blending
Features
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The brain produces electrical rhythms known as brainwaves. Different frequencies correlate with different mental states: deep sleep (Delta), lucid dreaming (Theta), relaxation (Alpha), active thinking (Beta), and peak focus (Gamma). Binaural beats work by playing two slightly different frequencies in each ear. The brain interprets the difference between them as a third beat frequency and gradually begins to synchronize with it. This is known as the frequency-following response. EEG studies suggest that both hemispheres work together when processing binaural beats, and that the brain’s electrical activity often shifts toward the difference frequency. This process is known as brainwave entrainment. Imagine two separate sound waves emitting from two different speakers. You can picture them expanding outward like concentric ripples as they collide in space. That point of collision creates what sounds like a pulse or beat. Isolate the two frequencies to your left and right ears. There is still a perceived rhythm where the waves differ, but not from a physical collision. This perceived beat is your brain interpreting the difference between the two tones. This naturally engages auditory pathways across both hemispheres. My name is John Grigsby (GRIGS). I am a musician, animator, sound designer, and I created this app. Sync Hemispheres is based on many years of work with sound, visuals, music, lucid dreaming techniques, and low-frequency cognitive entrainment. It is designed to help explore deeper rest, better focus, simultaneous use of both brain hemispheres, dream states, and self-guided mental awareness using controlled brainwave stimulation. The “Brainwaves” and “Brainwaves Timer” sections are dedicated to different ways of experiencing this phenomenon. The “Brainwaves” section lets you select different brainwave states with a slider and six presets. This includes five brainwave states, and one randomized Qigong state reflecting traditional Qigong flow and natural rhythmic drift. The “Brainwaves Timer” section lets you choose a starting and ending brainwave state, and how long you want your mind to gradually move from one to the other. These pages should be used with headphones. There is also an “Ambient Sounds” section. These include white noise, ocean waves, and meditative looping drones. A Tone slider lets you adjust the sound color. These ambient loops can be used on their own or blended with low-frequency binaural beats using the “Binaural Beats Blend” slider. This Ambient Sounds page can be enjoyed through the phone’s built-in speaker, external speakers, or with headphones if you prefer. To experience the full binaural-beat effect, use headphones. When listening with headphones, keep volume at a comfortable level and avoid excessively loud settings. Also, thanks to NASA for the use of their amazing satellite photography, which I used for some of the background imagery. ©2025 John Paul Grigsby — All Rights Reserved

About

CleanQuest

Features
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CleanQuest applies proven gamification mechanics to household cleaning, delivering measurable motivation through XP rewards, level progression and achievement tracking. 5-ROOM QUEST SYSTEM Structured task checklists for Kitchen (8 tasks), Bathroom (7 tasks), Bedroom (6 tasks), Living Room (7 tasks) and Laundry (6 tasks). Each completed task awards 15 XP. Completing all tasks in a room grants a bonus multiplier and increases the room level. Track completion percentage with visual progress rings. 30-QUESTION KNOWLEDGE ENGINE Expert-curated cleaning questions organized across 7 categories: Kitchen, Bathroom, Bedroom, Living Room, Laundry, General and All. Three difficulty levels per question. Each correct answer earns 10 XP. Questions are randomized per round with a maximum of 15 per session. DAILY CHALLENGE MODULE Algorithm-selected daily question based on date seed. Streak tracking with automatic reset on missed days. 25 XP bonus per correct daily answer. Historical performance log with correct/incorrect breakdown. XP AND LEVEL PROGRESSION Cumulative XP system with progressive level thresholds (Level N requires N x 100 XP). 6 title tiers: Novice Cleaner, Tidy Apprentice, Clean Warrior, Hygiene Hero, Spotless Master, Legendary Purifier. Real-time progress bar visualization. 15-BADGE ACHIEVEMENT SYSTEM Achievements span 7 categories: tasks completed, rooms mastered, quizzes finished, streak records, level milestones, daily dedication and high scores. Automatic unlock detection runs after every quiz session. DATA ARCHITECTURE Built on SwiftData for persistent local storage. 6 data models: GameSession, PlayerProfile, CleaningRoom, CleaningTask, Achievement, DailyChallengeRecord. Zero network calls. Zero analytics. Zero third-party SDKs. All user data remains exclusively on device. Requires iOS 17 or later. Optimized for iPhone.

Screenshots

Sync Hemispheres3 screens
CleanQuest4 screens

Verdict

The call

Sync Hemispheres and CleanQuest are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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.

ScorecardNo meaningful differences
Sync Hemispheres versus CleanQuest: the parameters behind the verdict, then further details
ParameterSync HemispheresCleanQuest
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyWeekly—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.6 — better17.0
Further details — not scored
Size138 MB1 MB
Age rating4+4+
DeveloperJohn Paul Grigsby晓 郭

In-app purchases

None

Sync Hemispheres

No in-app purchases

None

CleanQuest

No in-app purchases

Questions

Is Sync Hemispheres free?
Sync Hemispheres is free to download, with no in-app purchases.
Is CleanQuest free?
CleanQuest is free to download, with no in-app purchases.
Do Sync Hemispheres or CleanQuest have ads?
Neither Sync Hemispheres nor CleanQuest shows ads.

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