Comparison

Hz Frequency by Lamda vs SadBox

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

Head to head
About

Hz Frequency by Lamda

This app offers precision Hz frequency soundscapes designed to promote inner harmony, clarity, and calm. It features binaural beats and various admired frequencies embedded in relaxing music, with interactive visual meditations to support stress relief and sleep.

Highlights
  • Precision Hz frequency programs
  • Binaural Beats
  • Interactive 3D scenes
  • Includes 432 Hz, 528 Hz, and solfeggio frequencies
  • Stress relief and relaxation support
  • Short interactive exercises
Features
Read full description

LAMDA is a precision Hz frequency sound portal to align body, mind & soul. Mesmerize to visual quantum meditation and shift to support clarity, calm & sleep. Sine wave Hz frequencies are embedded in relaxing music, calibrated with high FFT size for clean, accurate delivery. Find admired frequencies like 432 Hz, 528 Hz, 396 Hz, the solfeggio scale, binaural beats for low frequency programs to use with headphones, and more - uncompressed for precise exposure. Each program aligns with different internal states - stress relief, emotional grounding, energy cleansing, relaxation, and expanding awareness - guiding the mind toward clarity, harmony, and calm. Use LAMDA’s 1-minute, interactive exercises to reset during moments of tension or overstimulation. USE Hz FREQUENCY BY LAMDA FOR: - Stress, anxiety, or emotional tension - Spiritual wellbeing and mindfulness - Align body, mind & soul - Focus & mental organization - Meditation, lucid states, or manifestation support - Returning to balance and inner calm - Sleep, rest, and gentle frequency support __________ FEATURES: - Precision Hz frequency programs with pure tone or layered - Calibrated sine wave frequencies embedded in minimalist compositions - Binaural Beats for your mind & soul - Includes 528 Hz, 432 Hz, 40 Hz, 42 Hz, 111 Hz, and solfeggio frequencies - 3D interactive scenes for sensory experience - Headphones optional for binaural effects __________ DESIGNED TO SUPPORT: - Stress relief and nervous system regulation - Spiritual conscious connection - Mesmerize to visual quantum meditations - Relaxation, calm, and inner peace - Meditation, mindfulness, aura cleansing, and raising vibration - Rest, recovery, and preparation for sleep __________ LAMDA offers premium content via subscription. Access all sound profiles and interactive scenes with a free trial; cancel anytime. LAMDA is not intended to diagnose, treat, or prevent medical or psychological conditions. Terms of Use: https://www.lamdalife.com/terms-of-use

About

SadBox

Features
Read full description

Some things aren’t safe to post on social media. This app gives you a private emotional journal where you can say anything—your fears, secrets, frustrations, late-night thoughts—completely without pressure. No followers. No likes. No algorithms. Just a safe space to be honest. SadBox — Your Safe Emotional Space Feeling overwhelmed, stressed, or carrying emotions with nowhere to release them? SadBox gives you a private place to express freely, calm your mind, and understand yourself better. Why SadBox Helps Private emotional journaling — no judgment, no pressure Stress-relief through writing — let emotions out safely Simple emotional trends & insights Build emotional resilience over time A quiet space with no social features Key Features Secure emotional journal Stress & calm index Emotion history timeline Clean, distraction-free design Works anytime, even offline SadBox gives your emotions a safe home, so your mind can breathe again. Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://lijunchenapp.com/SadBoxprivacy.html

Screenshots

Hz Frequency by Lamda4 screens
SadBox4 screens

Verdict

The call

The clearest difference is update cadence: Hz Frequency by Lamda at every 9 days against SadBox's every 4 weeks. Hz Frequency by Lamda also leads on iOS requirement (14.0.0 vs 18.0). 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. Hz Frequency by Lamda sells 5 in-app purchases, starting at $4.99 per month and SadBox sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Hz Frequency by Lamda ships an update every 9 days, SadBox every 4 weeks. The most recent releases landed on July 4, 2026 and September 7, 2026 respectively.

Scorecard2 real differences · 8 level
Hz Frequency by Lamda versus SadBox: the parameters behind the verdict, then further details
ParameterHz Frequency by LamdaSadBox
PriceFreeFree
Rating4.7 (19 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings19 — better—
Update frequencyEvery 9 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0.0 — better18.0
Further details — not scored
Size168 MB14 MB
Age rating4+4+
DeveloperJehan Radwan俊辰 黎

In-app purchases

5 purchases

Hz Frequency by Lamda

Subscriptions4
  • Monthly Premium3 Days trial$4.991 Month
  • Monthly Premium Standard3 Days trial$8.991 Month
  • Annual7 Days trial$19.991 Year
Show 1 more
  • Annual Premium7 Days trial$44.001 Year
One-time1
  • Lifetime$110.99
4 purchases

SadBox

Subscriptions3
  • Monthly Membership$1.991 Month
  • Quarterly Membership$4.993 Months
  • Annual Membership$8.991 Year
One-time1
  • Lifetime Membership$12.99

Questions

Is Hz Frequency by Lamda free?
Hz Frequency by Lamda is free to download, with in-app purchases available.
Is SadBox free?
SadBox is free to download, with in-app purchases available.
Do Hz Frequency by Lamda or SadBox have ads?
Neither Hz Frequency by Lamda nor SadBox shows ads.
Which is updated more often, Hz Frequency by Lamda or SadBox?
Hz Frequency by Lamda ships an update every 9 days, and SadBox every 4 weeks. Most recently, Hz Frequency by Lamda was updated on July 4, 2026 and SadBox on September 7, 2026.

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