Tethr App vs Bio Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tethr App
This app helps service providers manage their schedules and client bookings. Clients can book sessions, view appointments, and track their activity. It's designed for ongoing relationships with features like mobile-first scheduling and payment-enabled booking.
- Provider availability management
- Client management
- Session plan tracking
- Booking and appointment management
- Payment-enabled booking
- Mobile-first scheduling
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Tethr is a mobile scheduling and session management app for service providers and their clients. Providers can manage availability, clients, session plans, and bookings, while clients can book sessions, view upcoming appointments, and track their session activity. The app is designed for ongoing provider-client relationships and supports mobile-first scheduling, appointment management, and payment-enabled booking flows for session-based businesses.
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.
- Schedule and dose tracking
- Vial inventory management
- Injection site mapping
- Journal search and filtering
- AI-powered note organization
- Local data storage
- Data export
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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
Screenshots
Verdict
The clearest difference is in-app purchases: Tethr App at none against Bio Log's 1. Tethr App also leads on update cadence (every 5 days vs every 3 weeks) and device support (3 vs 1). On price, rating, ratings volume and 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
Both are free to download. Bio Log sells 1 in-app purchase, starting at $3.99 per month. Tethr App asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Tethr App against 5.0 for Bio Log. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
Tethr App ships an update every 5 days, Bio Log every 3 weeks. Both last shipped on October 31, 2026.
| Parameter | Tethr App | Bio Log |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 5 MB |
| Age rating | 4+ | 17+ |
| Developer | CEDIQUE JAVIERE HENRY | alexander rieger |
Customer experience
Tethr App
Bio Log
In-app purchases
Tethr App
No in-app purchases
Bio Log
- Bio Log Membership$3.991 Month
Questions
Is Tethr App free?
Is Bio Log free?
Which has better reviews, Tethr App or Bio Log?
Do Tethr App or Bio Log have ads?
Which is updated more often, Tethr App or Bio Log?
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