Core Body vs Ester
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Core Body
Plan and schedule fitness classes directly from your mobile device. View class schedules, sign up for sessions, and find the studio's location. Optimize your time and enjoy the convenience of managing your fitness activities on the go.
- Class scheduling
- Sign up for classes
- View class schedules
- Studio location access
- Mobile convenience
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Download the Core Body App today to plan and schedule your classes! From this mobile App, you can view class schedules and sign up for classes as well as view the studio’s location. Optimize your time and maximize the convenience of signing up for classes from your device! Download this App today!
Ester
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Ester is a private tracker for physician-prescribed hormone and peptide therapy - TRT, GLP-1 medications, and other injectable or oral treatments. Log doses in two taps, see estimated medication levels, keep your lab work in context, and watch your real progress. START WITH 7 DAYS FREE Every feature is included with an Ester Pro subscription, and new subscribers get a 7-day free trial. EVERYTHING STAYS ON YOUR DEVICE No account. No server. No analytics. Your data never leaves your phone - we could not hand it over if we wanted to. Lock the app with Face ID and choose a discreet home-screen icon. LOG IN TWO TAPS A daily checklist with reminders, streaks, and injection-site rotation history. Vial inventory tracks what you have on hand, how much is left, and when you'll run out. ESTIMATED LEVELS A levels chart estimates active medication from the doses you log, using published half-life values. Solid past, projected future, a steady-state badge - and a washout view when a treatment period ends. LABS IN CONTEXT Record blood panels with editable reference ranges. Trends show every marker against your treatment timeline, and values outside your reference range are flagged. RECEIPTS FOR YOUR PROTOCOL Report cards summarize each treatment period: weight, body composition, strength, lab changes, and adherence. Compare periods side by side and share progress cards with medication names hidden by default. ESTER NEVER GIVES ADVICE Ester tracks and visualizes data you enter. It does not recommend medications, doses, or schedules, and it is not a substitute for medical care. Always consult your physician. Ester requires an auto-renewing Ester Pro subscription ($4.99/month or $29.99/year). New subscribers get a 7-day free trial. Subscriptions renew unless cancelled in your App Store settings. Your data stays on your device even if your subscription ends. Terms: https://castanedanetworks.com/ester/terms Privacy: https://castanedanetworks.com/ester/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Core Body at none against Ester's 2. Core Body also leads on device support (3 vs 1) and iOS requirement (14.0 vs 18.0). Ester's advantage is ads (none vs shown). On price 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. Ester sells 2 in-app purchases, starting at $4.99 per month. Core Body asks for nothing beyond the download.
| Parameter | Core Body | Ester |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | — |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 151 MB | 3 MB |
| Age rating | 4+ | 12+ |
| Developer | Core Body LLC | Castaneda Networks LLC |
In-app purchases
Core Body
No in-app purchases
Ester
- Ester Pro7 Days trial$4.991 Month
- Ester Pro7 Days trial$29.991 Year
