Comparison

Bio Log vs SilentStar Breath

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

Head to head
About

Bio Log

This app helps you meticulously track peptide doses, vial details, and personal notes in a centralized journal. It offers daily views, logging capabilities, and history search, with optional AI assistance for summaries and organization. Records are stored locally for your control.

Highlights
  • Schedule and dose tracking
  • Vial inventory management
  • Injection site mapping
  • Journal search and filtering
  • AI-powered note organization
  • Local data storage
  • Data export
Read full description

Keep your peptide records clear, organized, and easy to review. Bio Log brings your schedules, dose entries, vial details, and personal notes into one focused journal. SEE YOUR DAY View scheduled entries and what you’ve already recorded. Keep reminders connected to the profiles you create. LOG WHAT HAPPENED Record an entry as taken or skipped. Add the amount, time, injection site, and notes you want to keep. Review your entry before saving. Choose a recorded injection site on the front-and-back body map and see which sites appear in your recent history. FIND YOUR HISTORY Search your journal by peptide or note. Filter taken and skipped entries, review earlier records, and make corrections when needed. Remove profiles from your active library without losing their history. Restore them from Archived whenever you need them. KEEP VIAL DETAILS TOGETHER Save vial amounts, lot information, and storage notes. See remaining inventory estimates based on your saved records. ADD CONTEXT Keep symptoms, lab results, and progress photos alongside your tracking. Review summaries of your own entries. BIO LOG AI Ask questions about your journal, organize notes, and review optional AI summaries in a clean conversation view. Draft logs remain yours to review and confirm before saving. YOUR RECORDS, YOUR CONTROL Journal records are stored on your device. Export your tracking records when you need them. Optional AI features use an online service with your permission. MEMBERSHIP Download Bio Log to explore the demo. Personal tracking and the full feature set require an auto-renewing monthly Bio Log Membership. Payment is charged to your Apple Account. Your subscription renews automatically unless canceled at least 24 hours before the current period ends. Manage or cancel your subscription in App Store account settings. Bio Log is for personal tracking and organization. It does not provide medical advice, diagnosis, treatment, dosing instructions, peptide recommendations, or sourcing advice. Consult a qualified healthcare professional before making medical decisions. AI-generated summaries may be incomplete or inaccurate. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://biolog-ai-backend.vercel.app/api/privacy

About

SilentStar Breath

Read full description

SilentStar Breath is not just another collection of breathing exercises. It is a personalised training program that adapts each session to your current level and progress. The Program uses your measurement results and your assessment of how difficult each completed session felt. Based on this information, it selects an appropriate starting point and adjusts the level of your next training sessions. You do not need to decide what to practise next. SilentStar guides you step by step, while the Program evolves based on your results and feedback. YOUR PROGRAM You begin with a measurement that helps determine your current level. SilentStar uses the result to select an appropriate starting point. After each session, you rate how difficult it felt. If the training is appropriate, the level may gradually increase. If it becomes too demanding, the app may maintain the current level or reduce the difficulty of upcoming sessions. This means the Program is not a fixed set of exercises. It adapts to your abilities and current progress. DIFFERENT TYPES OF TRAINING The Program uses different forms of breathing training, so it is not based on just one type of exercise. The app includes training designed to develop, among other things: • breath control • tolerance to the increasing urge to breathe • calmer and more conscious breathing • breathing rhythm • breathing during movement • reduced breathing Each session has a clearly defined structure, and the app guides you through every stage of the training. MEASUREMENTS AND PROGRESS SilentStar allows you to perform further measurements and track changes in your results over time. In the Progress section, you can view your activity, completed training sessions and measurement results. This allows you to follow your training and progress directly in the app. FREE TRAINING In addition to the Program, you can use Free Training and perform selected exercises whenever you want. You can choose from ready-made training settings or adjust selected parameters to suit your own needs. FOCUS ON YOUR TRAINING You do not need to keep watching the screen while you exercise. Depending on the type of session, the app uses voice guidance, sound cues, countdowns, animations and vibrations. The SilentStar Breath interface is available in Polish, English, German and Spanish. Voice guidance is available in Polish and English. PREMIUM ACCESS Free Training and the app's basic features are available free of charge. Full access includes the personalised Program, level selection based on your results, automatic adjustment of upcoming training sessions, Program-related measurements and progress tracking. You can start your subscription with a 7-day free trial. The price and subscription terms are always displayed in the App Store before you confirm your purchase. You can restore purchases directly in the app. IMPORTANT SilentStar Breath is a training and wellness app. It is not a medical device and is not intended to diagnose or treat medical conditions. Perform all exercises in a safe environment and according to how you feel. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Bio Log4 screens
SilentStar Breath4 screens

Verdict

The call

The clearest difference is update cadence: SilentStar Breath at every 11 days against Bio Log's every 3 weeks. SilentStar Breath also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases 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. Bio Log sells 1 in-app purchase, starting at $3.99 per month and SilentStar Breath sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Bio Log ships an update every 3 weeks, SilentStar Breath every 11 days. The most recent releases landed on October 31, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 6 level
Bio Log versus SilentStar Breath: the parameters behind the verdict, then further details
ParameterBio LogSilentStar Breath
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 3 weeksEvery 11 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size5 MB90 MB
Age rating17+4+
Developeralexander riegerSilentStar Group

In-app purchases

1 purchases

Bio Log

Subscriptions1
  • Bio Log Membership$3.991 Month
2 purchases

SilentStar Breath

Subscriptions2
  • SilentStar Breath - Monthly7 Days trial$3.991 Month
  • SilentStar Breath - Monthly7 Days trial$19.991 Year

Questions

Is Bio Log free?
Bio Log is free to download, with in-app purchases available.
Is SilentStar Breath free?
SilentStar Breath is free to download, with in-app purchases available.
Do Bio Log or SilentStar Breath have ads?
Neither Bio Log nor SilentStar Breath shows ads.
Which is updated more often, Bio Log or SilentStar Breath?
Bio Log ships an update every 3 weeks, and SilentStar Breath every 11 days. Most recently, Bio Log was updated on October 31, 2026 and SilentStar Breath on October 27, 2026.

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