Comparison

SKC vs HemiSync

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

Head to head
About

SKC

Access a comprehensive database for Yu-Gi-Oh! cards and products. Search by name or ID, view detailed card effects, ban list status, and product contents. Discover trending cards and upcoming TCG information with a fast, clean interface.

Highlights
  • Search cards by name or ID
  • Detailed card information (effects, ban list, printing dates)
  • Product details and related cards
  • Upcoming TCG product information
  • Current and past format ban lists
  • Trending cards and products
  • Fast and clean UI
Features
Read full description

A fast, ad-free Yu-Gi-Oh! card database for your phone. Search any card, check any ban list, and see every product a card was printed in — with no ads, no account, and no subscription. Buy it once and it's yours. CARDS ► Search by card name or card ID ► Full details on any card: effect, ban list status, last printing date, and every product it appeared in ► Effect Breakdown splits a card into its summon conditions and each of its individual effects, labeled with the tags and counters each one involves ► Card suggestions — named materials, cards referenced in the text, what the card can be used to summon, and cards that play similarly ► Browse and filter by the stats that fit your play style ► Card of the day, plus a look at what released on this day BAN LISTS & FORMATS ► Current and past Forbidden & Limited lists ► TCG, Master Duel and Genesys all supported ► Genesys card scores, current and historical ► A card's full ban history at a glance, right on the card page PRODUCTS ► Card counts and full contents for every product ► Every rarity a card appears in, so you're never caught off guard when a card has more than one ► Browse and filter products by year, type and more ► A product's makeup broken down visually in charts ► Upcoming TCG product releases BUILT RIGHT ► Built natively for iPhone — quick to open, quick to search ► Recently viewed follows you across your devices with iCloud ► Trending cards and products, driven by what people are actually looking u ► No ads. No tracking. No account. No subscription. Note: Konami owns all rights to Yu-Gi-Oh! and all card images used in this app. This app is not affiliated with Konami and all assets are used under Fair Use.

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

SKC4 screens
HemiSync4 screens

Verdict

The call

The clearest difference is price: HemiSync at Free against SKC's $1.99. HemiSync also leads on ratings volume (9 vs 2). SKC's advantage is rating (5.0 vs 4.2) and in-app purchases (none vs 1). On ads, device support and iOS requirement 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; SKC costs $1.99 up front. HemiSync sells 1 in-app purchase, starting at $0.99 per month. SKC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SKC holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 2 and 9 respectively.

UpkeepUpdate frequency

SKC ships an update every 9 days, HemiSync every 5 weeks. The most recent releases landed on September 18, 2026 and August 29, 2026 respectively.

Scorecard6 real differences · 4 level
SKC versus HemiSync: the parameters behind the verdict, then further details
ParameterSKCHemiSync
Price$1.99Free — better
Rating5.0 (2 ratings) — better4.2 (9 ratings)
Positive reviews—100.0% of reviews
Number of ratings29 — better
Update frequencyEvery 9 days — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhoneiPhone
Requires iOS18.618.4 — better
Further details — not scored
Size21 MB61 MB
Age rating9+4+
Developerjavier GomezEngineZero

Customer experience

SKC

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

HemiSync

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

In-app purchases

None

SKC

No in-app purchases

1 purchases

HemiSync

Subscriptions1
  • Premium$0.991 Month

Questions

Is SKC free?
SKC costs $1.99, with no in-app purchases.
Is HemiSync free?
HemiSync is free to download, with in-app purchases available.
Which has better reviews, SKC or HemiSync?
SKC is rated higher. SKC averages 5.0 out of 5 from 2 ratings, while HemiSync averages 4.2 from 9 ratings.
Do SKC or HemiSync have ads?
Neither SKC nor HemiSync shows ads.
Which is updated more often, SKC or HemiSync?
SKC ships an update every 9 days, and HemiSync every 5 weeks. Most recently, SKC was updated on September 18, 2026 and HemiSync on August 29, 2026.

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