Comparison

ALPHA PRO vs Calm Sleep

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

Head to head
About

ALPHA PRO

Features
Read full description

This APP is for personal and private meditation. It is designed as a personal lab for your own experimentation and relaxation. This APP digitally generates two pure sinusoidal tones of a fixed frequency and presents one to each ear. The frequency difference between these two tones is precisely controlled in the frequency range of 1 to 100 Hz. This covers the Delta (1-3 Hz), Theta (4-7 Hz), Alpha (8-12 Hz), Beta (13-30 Hz) and Gamma (31-100 Hz) brain wave ranges. The upper frequency difference limit is 100 Hz which is the top of the Gamma range. The Delta range represents a deep stage of slow wave (NREM) sleep. The Theta range represents hippocampal or cortical brain oscillations which are common in rapid eye movement (REM) sleep. The Alpha range represents an occipital brain oscillation which is common during wakeful relaxation with the eyes closed. Alpha and Theta ranges are both useful in pain management and for boosting creativity. With some practice and persistence you will develop a spontaneous ability to enter these states. The Beta range represents the normal awake state. The Gamma range represents extremely high levels of cognitive functioning and concentration, especially around 40 Hz. A Phase mode feature is also available in this APP but is totally experimental. This feature activates automatically when you reduce the difference frequency to zero. This mode places the same frequency in each ear but allows you to adjust the phase between the two signals from 0 to 359 degrees. This may effect the way the left and right brain transfer information and could perhaps lead to interesting discoveries. We recommend the use of headphones or earbuds to ensure that each ear only hears the single pure tone for that ear. Although these tones are unique to each ear, your brain will detect the difference and you will sense a beat frequency in the appropriate range. Your brain will respond to this selected beat frequency and will start to generate a matching signal. Learning to achieve the appropriate state of consciousness will relax you and help to put you in a more creative state of mind. This is a deep level of mind which is normally reached during prolonged meditation. Relax, be patient and experiment to find the right tones that relax you. The Alpha range is great for getting into a creative state whereas the Theta range is best for deep relaxation. The Delta range will help you to achieve deep sleep. Read about these states on the internet and experiment with them using this App. You can fully customize the frequencies to match your needs. This you will learn through experimentation. Press the "Back" button to return to the Alpha Pro control page. Use this APP responsibly and find a safe place to be in a comfortable sitting position where you will not be disturbed. Do not operate machinery or drive a vehicle while listening to these tones. If you find this app useful, please rate it with Apple.

About

Calm Sleep

This app offers a comprehensive sleep support system with over 300 hours of content, including narrated stories, music, and soundscapes. It helps users develop better sleep habits through guided routines, breathwork, and sleep plans, with features for tracking and analyzing sleep patterns.

Highlights
  • Sleep Stories
  • Music & Soundscapes
  • Breathwork Exercises
  • Sleep Plans
  • Sleep Tracking & Insights
  • Favorites & Timers
Features
Read full description

From the makers of Calm, the top Meditation & Mindfulness app trusted by 40M+ listeners, Calm Sleep is a new standalone app for deeper, more personalized sleep support. Take the stress out of sleep with over 300+ hours of sleep content from leading sleep and mindfulness experts listened to for more than 50 billion minutes. We make it effortless to fall (and stay) asleep. Whether it’s with a gentle stretch or calming Sleep Stories®, we help replace bad sleep habits with a better wind down to help you clear your headspace and find better sleep. Fall (and stay) asleep easily, with narrated Sleep Stories, music, soundscapes, breathwork, and routines that are made to help you relax. Backed by leading sleep and mindfulness experts around the world. Of Calm users who use Calm Sleep Stories 5x a week, 92% saw higher sleep quality and 72% reported less stress. Our holistic wake-up, daytime, wind-down, and bedtime plans fit seamlessly into your life, so you can finally rest easy and wake up feeling refreshed. Download today to discover sound sleep and relaxation. FREE YOUR MIND WITH THE FEATURES OF CALM SLEEP: - Favorites - save your favorite content to return to every night - Timers - stop the app after a set amount of time - Sleep Plans - improve your sleep hygiene and form good habits that help you sleep better - Data - review your sleep patterns/trends over time RELAX WITH SLEEP STORIES - Simplify bedtime when you choose from 500+ Sleep Stories - From sci-fi to fantasy or kids' stories to ASMR- Calm Sleep has plenty of options that promote better sleep - Wonder - Matthew McConaughey - Dream with Me - Harry Styles - Crossing Ireland by Train - Cillian Murphy - Beauty and the Beast - Alan Sklar MUSIC AND SOUNDSCAPES - Sleep better with your choice of sound machine noise - Relax with calming soundscapes that can help you clear your headspace - Enjoy Ocean waves, Heavy Rain, Camp Fire, Babbling Brook, ASMR sounds, pink noise, brown noise, and more MEDITATIONS HELP TO CLEAR YOUR HEADSPACE - Create better habits and relax - Free your thoughts with mindfulness exercises, body scans and wind down routines help you with stress and anxiety relief - Access deep sleep plans that help you find consistent and restful sleep - Breathwork exercises help to center your thoughts and get you one step closer to better sleep CONNECT WITH APPLE HEALTHKIT FOR SLEEP TRACKING & INSIGHTS - Sleep Tracker- optimize your sleep performance with sleep tracking & insights - Integrate with accepted mobile device health tracking tools - Receive guidance and action recommendations based on your sleep habits and data SUBSCRIPTION PRICING AND TERMS: Calm Sleep offers an auto-renewing yearly subscription at $69.99/year to provide you with unlimited access to Calm Sleep content while you maintain an active subscription. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew at the then-current retail price unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Read more about our terms and conditions here: Terms of service: https://www.calm.com/terms Privacy policy: https://www.calm.com/privacy

Screenshots

ALPHA PRO4 screens
Calm Sleep4 screens

Verdict

The call

The clearest difference is price: Calm Sleep at Free against ALPHA PRO's $3.99. Calm Sleep also leads on update cadence (every 6 days vs every 34 months). ALPHA PRO's advantage is in-app purchases (none vs 3) and device support (3 vs 1). On ads 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

Calm Sleep is free to download; ALPHA PRO costs $3.99 up front. Calm Sleep sells 3 in-app purchases, starting at $19.99 per month. ALPHA PRO asks for nothing beyond the download.

UpkeepUpdate frequency

ALPHA PRO ships an update every 34 months, Calm Sleep every 6 days. The most recent releases landed on October 29, 2026 and November 8, 2026 respectively.

Scorecard5 real differences · 5 level
ALPHA PRO versus Calm Sleep: the parameters behind the verdict, then further details
ParameterALPHA PROCalm Sleep
Price$3.99Free — better
Rating—4.7 (3.7K ratings) — better
Positive reviews—52.7% of reviews
Number of ratings—3.7K — better
Update frequencyEvery 34 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size2 MB103 MB
Age rating4++4
DeveloperDigilog CorporationCalm.com

In-app purchases

None

ALPHA PRO

No in-app purchases

3 purchases

Calm Sleep

Subscriptions3
  • Calm Sleep Premium$19.991 Month
  • Calm Sleep Premium1 Year trial$69.991 Year
  • Calm Sleep Premium7 Days trial$69.991 Year

Questions

Is ALPHA PRO free?
ALPHA PRO costs $3.99, with no in-app purchases.
Is Calm Sleep free?
Calm Sleep is free to download, with in-app purchases available.
Do ALPHA PRO or Calm Sleep have ads?
Neither ALPHA PRO nor Calm Sleep shows ads.
Which is updated more often, ALPHA PRO or Calm Sleep?
ALPHA PRO ships an update every 34 months, and Calm Sleep every 6 days. Most recently, ALPHA PRO was updated on October 29, 2026 and Calm Sleep on November 8, 2026.

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