Comparison

Personality Tests vs Sync Hemispheres

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

Head to head
About

Personality Tests

Explore your inner self through fun, psychology-inspired quizzes. Discover your 'Kittenhood Wound,' 'Inner Shadow Meow,' and 'Lover Style' with playful questions and surprisingly deep insights. New tests are added regularly.

Highlights
  • Kittenhood Wound exploration
  • Inner Shadow Meow insights
  • Past Lives archetypes
  • Lover Style analysis
  • Regularly updated tests
  • Psychology-inspired quizzes
Features
Read full description

KitZen: Personality Tests with a Cat Twist Answer not-so-serious questions. Get shockingly accurate results. That’s the magic of KitZen — the cat-oracle app where fun quizzes meet psychology-inspired insights. What’s inside? Your Kittenhood Wound – explore the little kitten inside you and what shaped you Inner Shadow Meow – uncover your hidden drama (and your hidden potential). Past Lives Test – meet the archetypes your soul’s been carrying through nine lives. Lover Style – find out what kind of charmer you really are. More tests drop regularly — because cats never run out of curiosity. Why KitZen? Casual, playful questions with surprisingly deep takeaways. Tests inspired by psychology & archetypes. A way to learn more about yourself without it feeling like “work.” Pricing Weekly plan – $6.99 Yearly plan – $19.99 (best deal) Payment will be charged to your Apple account upon confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple account settings. Privacy matters: https://sites.google.com/view/kitzen-privacy-policy https://sites.google.com/view/kitzen-terms-conditions

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
Read full description

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

Screenshots

Personality Tests4 screens
Sync Hemispheres3 screens

Verdict

The call

The clearest difference is in-app purchases: Sync Hemispheres at none against Personality Tests's 3. On price, rating, ratings volume and update cadence 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. Personality Tests sells 3 in-app purchases, starting at $3.99 per 7 days. Sync Hemispheres asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Personality Tests against 5.0 for Sync Hemispheres. Both are backed by a comparable volume of ratings — 7 and 3 respectively.

UpkeepUpdate frequency

Personality Tests ships an update every 5 days, Sync Hemispheres weekly. The most recent releases landed on October 24, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Personality Tests versus Sync Hemispheres: the parameters behind the verdict, then further details
ParameterPersonality TestsSync Hemispheres
PriceFreeFree
Rating4.9 (7 ratings)5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings7 — better3
Update frequencyEvery 5 days — betterWeekly
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.6 — better
Further details — not scored
Size178 MB138 MB
Age rating12+4+
DeveloperPalina ChernavtsevaJohn Paul Grigsby

Customer experience

Personality Tests

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Sync Hemispheres

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Personality Tests

Subscriptions2
  • Weekly Pro Plan3 Days trial$3.997 Days
  • Yearly Pro Plan$19.991 Year
One-time1
  • Lifetime Pro Plan$19.99
None

Sync Hemispheres

No in-app purchases

Questions

Is Personality Tests free?
Personality Tests is free to download, with in-app purchases available.
Is Sync Hemispheres free?
Sync Hemispheres is free to download, with no in-app purchases.
Which has better reviews, Personality Tests or Sync Hemispheres?
Sync Hemispheres is rated higher. Personality Tests averages 4.9 out of 5 from 7 ratings, while Sync Hemispheres averages 5.0 from 3 ratings.
Do Personality Tests or Sync Hemispheres have ads?
Neither Personality Tests nor Sync Hemispheres shows ads.
Which is updated more often, Personality Tests or Sync Hemispheres?
Personality Tests ships an update every 5 days, and Sync Hemispheres weekly. Most recently, Personality Tests was updated on October 24, 2026 and Sync Hemispheres on September 18, 2026.

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