Comparison

HearTomo vs InnerSync Pro

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

Head to head
About

HearTomo

Read full description

HearTomo is an app that works with Apple Health to perform 1/f fluctuation slope, Lorenz plot, and emotion analysis from ECG data from Apple Watch. 1/f Fluctuation Slope Value The heartbeat interval RRI data is converted to power spectral density PSD and the 1/f fluctuation slope value is calculated. You can see the value change over time in a graph: day, week, month, 6 months, and 1 year. Lorenz Plot One of the time domain indicators of autonomic nerve activity, RRI(n) is the interval between the nth heartbeat and the heartbeat before it. The value of RRI(n) is plotted on the x-axis and the value of RRI(n+1) on the y-axis. Order-made Emotion Analysis The accumulated data of the user is learned and updated daily to estimate emotions that suit the individual. The activity status of the sympathetic and parasympathetic nerves is classified into four states: "Both nerves are high", "Only sympathetic nerves are high", "Only parasympathetic nerves are high", and "Both nerves are low". Emotions are estimated as "inner voice". HearTomo's basic technology HearTomo development is based on the heart rate data analysis system patent 6430729 in collaboration with ZMP and Mr. Osaka Motohisa (graduate of the Department of Mathematics, Faculty of Science, University of Tokyo and the Department of Medicine, Faculty of Medicine, Nippon Medical School, currently Professor Emeritus, Nippon Veterinary and Life Science University). Mr. Osaka Motohisa conducted heart rate fluctuation analysis using his own calculation formula and an algorithm for spectral analysis of heart rate variability developed by Professor Ronald Berger from Johns Hopkins University Hospital. To improve the accuracy of the analysis, let's capture a clean heart rate waveform. Fix your arm on a table or your knee, and keep your fingers still for 30 seconds. After scrolling down to see the measurement results and tapping 'Done,' perform another 30-second measurement. A total of 4 repetitions, requiring 2 minutes of data, is necessary, and compared to other apps' 30-second measurements, HearTomo offers 4 times higher accuracy. Try to perform 4 consecutive measurements without leaving too much time between them. Website: https://heartomo.com/?lang=en Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

InnerSync Pro

Features
Read full description

InnerSync Pro. Cardiac coherence in the hands of professionals. You're a practitioner, coach, therapist, or healthcare professional. Your clients count on you for concrete results, not just an impression. InnerSync Pro equips you for exactly that: reliable measurements, clear tracking, precise guidance. Connect a Bluetooth heart sensor. Start a session. Within minutes, you hold a complete, clear analysis in your hands, ready to use with your client right away. DESIGNED FOR YOUR PRACTICE Your entire client base, organized and instantly accessible. Complete history and progress tracking for every client. Your clients get involved: they share their sessions, you follow their progress. Trend graphs to visualize the journey. Session comparison to measure progress. PROFESSIONAL ANALYTICS Tachogram: every beat, every variation. Spectrogram: the autonomic nervous system's evolution over time. Automated interpretations and personalized recommendations. The app translates complexity into clear, actionable insights. ENGAGING SESSIONS Visual, calming breathing guidance. Real-time feedback on coherence quality. Automatic artifact detection. Your data stays reliable. DR DAVID O'HARE TRAININGS Cardiac coherence trainings designed and led by Dr David O'Hare, a physician and world-renowned expert. Learn, refine your skills, certify your approach. Optimized for iPhone and iPad Your data and your clients' data: protected, secure, yours. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.innersync.io/en/privacy-policy

Screenshots

HearTomo4 screens
InnerSync Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: InnerSync Pro at none against HearTomo's 1. InnerSync Pro also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). HearTomo's advantage is update cadence (every 9 days vs every 2 months). On price and ads there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. HearTomo sells 1 in-app purchase, starting at $49.99 per year. InnerSync Pro asks for nothing beyond the download.

UpkeepUpdate frequency

HearTomo ships an update every 9 days, InnerSync Pro every 2 months. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

Scorecard4 real differences ยท 2 level
HearTomo versus InnerSync Pro: the parameters behind the verdict, then further details
ParameterHearTomoInnerSync Pro
PriceFreeFree
Update frequencyEvery 9 days โ€” betterEvery 2 months
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS17.015.1 โ€” better
Further details โ€” not scored
Size29 MB62 MB
Age rating4+4+
DeveloperROBO-HI CorporationAGS SRL

In-app purchases

1 purchases

HearTomo

Subscriptions1
  • Premium Subscription$49.991 Year
None

InnerSync Pro

No in-app purchases

Questions

Is HearTomo free?
HearTomo is free to download, with in-app purchases available.
Is InnerSync Pro free?
InnerSync Pro is free to download, with no in-app purchases.
Do HearTomo or InnerSync Pro have ads?
Neither HearTomo nor InnerSync Pro shows ads.
Which is updated more often, HearTomo or InnerSync Pro?
HearTomo ships an update every 9 days, and InnerSync Pro every 2 months. Most recently, HearTomo was updated on September 15, 2026 and InnerSync Pro on September 17, 2026.

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