Comparison

Isochronic vs Mannavibes Xtal

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

Head to head
About

Isochronic

Generate custom isochronic tones for brainwave entrainment. Mix tones with your own music, set timers, and use presets for various states like sleep or meditation. Save your favorite tones for quick access.

Highlights
  • Custom isochronic tone generation
  • Carrier tone adjustment
  • Mix with own music
  • Adjustable wave volume
  • Timer up to 59 minutes
  • Preset sessions
  • Memory slots for favorite tones
Features
Read full description

The Isochronic Tone Generator does just what it says: You can create any Isochronic Tone (between 0.01 and 50Hz) with a carrier between 50 and 999Hz. You can also mix the tone with your own music, set the wave volume in the mix, set a timer (up to 59 mins), program target isochronic frequencies for your brain entrainment sessions, use presets to start easy entrainment sessions and memory slots to put your favorite tones. As simple as it gets... Enjoy! FEATURES: ======= * Variable carrier tone * Variable isochronic tone * Fine tune for carrier, isochronic and target frequencies * Mix the tone with your own music * Wave volume for better mixing * Timer (up to 59 minutes) * Entrainment sessions: Just set the target frequency using the black indicator below the isochronic tone. * Presets (sleep, relax, awake and meditate) * Memory slots: for having your favorite tones one tap away ------------------------ Isochronic tones are regular beats of a single tone used for brainwave entrainment. Similar to monaural beats, the interference pattern that produces the beat is outside the brain so headphones are not required for entrainment to be effective. They differ from monaural beats, which are constant sine wave pulses rather than entirely separate pulses of a single tone. As the contrast between noise and silence is more pronounced than the constant pulses of monaural beats, the stimulus is stronger and has a greater effect on brain entrainment (taken from: http://www.mindalive.com/articleeleven.htm) ------------------------- Isochronic beats are not intended to treat or cure any disease, nor should any of the subject matter presented on this app or website be taken as medical advice. Please consult your doctor if you have a medical condition. The products on this website have not been evaluated by the Food and Drug Administration (FDA). People with epilepsy should not use mind entrainment products without the approval of an appropriate medical physician. However rare, there is a risk of seizure associated with individuals who are predisposed to seizures. Consult your doctor directly if you have any questions or concerns regarding Isochronic beat technology's effect on epilepsy. Do not drive a car or operate dangerous machinery while listening to this product. This technology can produce hyper-relaxed states that can interfere with your ability to react as needed while driving or operating machinery. There are no known contraindications to medication or chemical therapies, but if in doubt, consult your doctor. If you have any questions consult the doctor who provides your treatment.

About

Mannavibes Xtal

This app transforms your smartphone into a personal wellness device by generating specific PEMF frequencies. It offers 13 pre-programmed functions for therapeutic applications like pain and tension relief, utilizing natural frequencies found in healthy organisms.

Highlights
  • Smartphone wellness device
  • PEMF signal generator
  • 13 pre-programmed functions
  • Pain and tension relief
  • Natural frequency generation
Features
Read full description

Mannavibes™ Xtal app turns your smartphone into a personal wellness device. The patent-pending Mannavibes Xtal solution includes proprietary electronics encapsulated in a natural gemstone, and made available and affordable through the ease and comfort of smartphones. The Mannavibes application includes a signal generator, which generates pre-programmed specific PEMF modulated frequencies. App includes the usage of 13 PEMF functions. PEMF is widely used for therapeutic applications, such as pain/tension relief. These pre-programmed frequencies follow fundamental scaling principles, and are found in nature, and to which healthy living organisms resonate. Disclaimer: Mannavibes and any of it's products do not diagnose, cure, prevent or treat disease. If you have a medical condition or concern, please consult an appropriate health care professional.

Screenshots

Isochronic4 screens
Mannavibes Xtal4 screens

Verdict

The call

The clearest difference is price: Mannavibes Xtal at Free against Isochronic's $5.99. Mannavibes Xtal also leads on review sentiment (100% vs 92%) and iOS requirement (9.0 vs 12.0). Isochronic's advantage is update cadence (every 6 weeks vs every 9 months) and ratings volume (66 vs 5). On rating, ads, in-app purchases and monetization model 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

Mannavibes Xtal is free to download; Isochronic costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Mannavibes Xtal holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Isochronic has 66 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 92% of Isochronic's written reviews are positive against 100% of Mannavibes Xtal's.

UpkeepUpdate frequency

Isochronic ships an update every 6 weeks, Mannavibes Xtal every 9 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Isochronic versus Mannavibes Xtal: the parameters behind the verdict, then further details
ParameterIsochronicMannavibes Xtal
Price$5.99Free — better
Rating4.8 (66 ratings)5.0 (5 ratings) — better
Positive reviews92.0% of reviews100.0% of reviews — better
Number of ratings66 — better5
Update frequencyEvery 6 weeks — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.09.0 — better
Further details — not scored
Size3 MB87 MB
Age rating9+12+
DeveloperCML StudioMannavibes INC.

Customer experience

Isochronic

All ratings67 ratings
Positive98.5%
Neutral1.5%
Negative0.0%
Written reviews50 reviews
Positive92.0%
Neutral4.0%
Negative4.0%

Mannavibes Xtal

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Isochronic

Reported bugs

3 issues
  • Tone pauses randomly when receiving a notification
  • Clicking effect in speakers
  • Info buttons do not provide information

Requested features

21 requests
  • Extend timer duration
  • Gradually ramp down volume at stop
  • Type desired frequencies instead of scrolling
  • Timer for frequency ramp duration
  • Multiple sections for frequency and duration
Show 16 more
  • Increase carrier frequency range to 20kHz
  • Wider range of frequencies for intuition
  • More slots to save presets
  • More information on frequency usage
  • Ability to use 3 different Isochronic tones at once
  • iPad version
  • Centralized location for frequency information
  • Longer session timers
  • Easier interface for music selection
  • Expand tone frequency below 4Hz (e.g., 0Hz)
  • Ability to ramp up and down to chosen frequencies
  • Store presets
  • Include white, brown, and pink noise background sounds
  • Expand carrier frequency below 100Hz
  • Add binaural delay between left and right channel
  • Add additional carrier frequencies

Mannavibes Xtal

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Isochronic

No in-app purchases

None

Mannavibes Xtal

No in-app purchases

Questions

Is Isochronic free?
Isochronic costs $5.99, with no in-app purchases.
Is Mannavibes Xtal free?
Mannavibes Xtal is free to download, with no in-app purchases.
Which has better reviews, Isochronic or Mannavibes Xtal?
Mannavibes Xtal is rated higher. Isochronic averages 4.8 out of 5 from 66 ratings, while Mannavibes Xtal averages 5.0 from 5 ratings.
Do Isochronic or Mannavibes Xtal have ads?
Neither Isochronic nor Mannavibes Xtal shows ads.
Which is updated more often, Isochronic or Mannavibes Xtal?
Isochronic ships an update every 6 weeks, and Mannavibes Xtal every 9 months. Most recently, Isochronic was updated on November 6, 2026 and Mannavibes Xtal on November 3, 2026.

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