Comparison

DELTA55 vs Aura Sync

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

Head to head

Binaural audio for your mind.

Free

💪 Health & Fitness

No ratingsView app →

About

DELTA55

Features

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With the DELTA55 app interacting with your fitness club on your mobile device has never been easier. Manage everything from your class bookings to your membership details for a full club experience. Download the app to: - Enter your club using QR codes - Book classes with your favorite club - Get club details such as opening hours, location, etc. - Invite friends to join your club - Monitor club and class attendance history - Preview your membership details - Receive class reminders

About

Aura Sync

Features

Read full description

An app for listening to binaural presets at set tones and variations alongside environmental loops. Perfect for sleep, relaxation, meditation, thoughtfulness, concentration, healing, and other activities. Select from pre-made presets or create your own binaural and save it for use whenever you'd like.

Screenshots

DELTA554 screens

Aura Sync4 screens

Verdict

The call

The clearest difference is update cadence: Aura Sync at every 3 days against DELTA55's every 2 months. DELTA55's advantage is iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DELTA55 ships an update every 2 months, Aura Sync every 3 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 4 level

DELTA55 versus Aura Sync: the parameters behind the verdict, then further details
Parameter	DELTA55	Aura Sync
Price	Free	Free
Update frequency	Every 2 months	Every 3 days — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone	iPhone
Requires iOS	16.6 — better	26.0
Further details — not scored
Size	103 MB	213 MB
Age rating	4+	4+
Developer	Perfect Gym Solutions Sp. z o.o.	Eric Dolecki

In-app purchases

None

DELTA55

No in-app purchases

None

Aura Sync

No in-app purchases

Questions

Is DELTA55 free?

DELTA55 is free to download, with no in-app purchases.

Is Aura Sync free?

Aura Sync is free to download, with no in-app purchases.

Do DELTA55 or Aura Sync have ads?

Neither DELTA55 nor Aura Sync shows ads.

Which is updated more often, DELTA55 or Aura Sync?

DELTA55 ships an update every 2 months, and Aura Sync every 3 days. Most recently, DELTA55 was updated on September 24, 2026 and Aura Sync on September 22, 2026.