Regimen vs fillin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Regimen
Log injections, doses, side effects, and weight for GLP-1, TRT, HRT, and peptide medications. Plan schedules, rotate injection sites, track vials, bloodwork, and nutrition. Syncs with Apple Health and offers a compound library.
- Log injections and doses
- Track side effects and weight
- Schedule custom dosing
- Rotate injection sites
- Sync with Apple Health
- Monitor bloodwork and labs
- Visualize medication levels
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Regimen is a peptide and GLP-1 tracker app with 30,000+ downloads, built to log injections, doses, side effects and weight, whether you're on GLP-1 weight loss medication, peptides, TRT or HRT. Plan schedules, rotate injection sites, track vials, bloodwork, nutrition and progress photos, and sync Apple Health, with a 200+ compound library. Free for your first compound, with no time limit. A subscription adds more compounds and advanced features, with a 14-day free trial. WHAT YOU CAN TRACK - Peptides (BPC-157, TB-500, GHK-Cu, CJC-1295, Ipamorelin, and more) - GLP-1 medications and pens, brand-name or compounded (Semaglutide, Tirzepatide, Ozempic, Mounjaro, Wegovy, Zepbound) - Testosterone replacement therapy (TRT), with your bloodwork and lab results - Hormone replacement therapy (HRT) - Performance compounds - Oral medications, nasal sprays, and any compound with a dosing schedule - Custom medications CUSTOM SCHEDULING Daily, weekly, twice weekly (every 3.5 days), every X days, specific days (Mon/Wed/Fri), as needed, or on/off cycles with start and stop reminders. Set different doses on different days, or several doses a day, each with its own amount. Get a reminder for every dose. Dose titration lets you plan dose increases in advance, for example 2.5 mg for 4 weeks, then 5 mg, then 10 mg, and Regimen moves every dose to the right day. SEE YOUR PATTERNS Regimen reads your doses, side effects, weight, sleep and labs together and flags the patterns, measured against your own baseline. For example: food noise quieter since your dose went from 2 to 4 mg, or hematocrit trending up since starting testosterone. APPLE HEALTH INTEGRATION Connect Apple Health and automatically sync weight, body fat, lean mass, sleep stages, HRV, resting heart rate, blood pressure, blood glucose, steps, workouts and nutrition, right next to your doses. Overlay any compound against your health data and daily symptoms. Started tirzepatide? Watch your weight respond and compare it to published clinical trial averages. Changed your TRT dose? See how your sleep and energy responded. NUTRITION AND ACTIVITY Keep track of your protein and water with daily goals, plus your steps and workouts, right alongside your doses. SIDE EFFECTS AND DAILY MARKERS Track side effects from your GLP-1 or any other medication, plus 50+ daily markers: energy, mood, sleep quality, libido, cravings, water retention, joint pain, injection-site reactions, and more. WATCH YOUR LABS MOVE Log every bloodwork pull. See testosterone, lipids, glucose and more move with your protocol. INJECTION MANAGEMENT Log where you inject every dose, rotate your sites, and see your full injection history. Each dose card shows your units marked on a syringe, and you can see the planned site for every upcoming dose. VISUALIZE MEDICATION LEVELS See compound levels in your body hour by hour with half-life plotting. Understand when medications are most active. SEE YOUR TRANSFORMATION Weight, body composition and body measurements (waist, hips, chest, arms and more) over time, plus progress photos as before-and-after pairs and weekly grids. NEVER RUN OUT MID-CYCLE Track vials, pens and tablets with low-stock alerts. Import your history by CSV and export your data anytime. YOUR DATA IS PRIVATE Your data is encrypted in transit and at rest, and synced across your devices. We never sell it. You are in full control of your data. IMPORTANT DISCLAIMER Regimen is for tracking and organization only. It does not provide medical advice, recommend doses, or calculate doses or syringe units. Always consult your healthcare provider before starting or changing any protocol. Questions? Email support@helloregimen.com Privacy: https://helloregimen.com/privacy Terms: https://helloregimen.com/terms
fillin
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Build a supplement routine you'll actually keep. Tell fillin what you want in plain language—"I want to sleep better and feel less stressed"—and get a stack of nutrients, products and daily check-ins for that goal. Then track it in one place, every day. WHY FILLIN Most people take supplements without knowing what they take, why, or whether it helps. fillin turns that into a routine you can see: what's in your stack, what you took today, and how you feel over time. BUILD A STACK FROM ONE SENTENCE Describe your goal. fillin proposes ingredients with doses, products that cover them, and the check-ins that matter for that goal—each with its sources. Review, adjust, and create your stack in seconds. MORE THAN ONE STACK Sleep, training, focus—keep a separate stack for each goal, with its own supplements and tracking. Today rolls them all into one daily view. TODAY, IN ONE VIEW Check off what you took. Log how you feel on a simple 1–5 scale. One progress ring shows where you stand across all your stacks. KNOW WHAT YOU HAVE Items keeps your products in two lists—already have and to buy—and adds up ingredients across your stacks so you don't double up. FIND AND COMPARE Search supplements by need or ingredient and compare products before you buy. Purchases happen outside the app. INSIGHTS As you track, fillin builds reports that connect your routine to how you feel—so you can see what's working and what isn't. APPLE WATCH (OPTIONAL) Wear an Apple Watch to sleep and fillin can read sleep and activity data from Apple Health to show passive trends on Today. Read-only, clearly labeled, and entirely optional. fillin is a wellness and organization tool. Its suggestions are general information, not medical advice. It does not diagnose or treat any condition—always consult a qualified professional about your health and any supplements you take.
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Verdict
The clearest difference is in-app purchases: fillin at none against Regimen's 2. Regimen's advantage is update cadence (every 9 days vs every 2 months) and device support (3 vs 1). On price 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. Regimen sells 2 in-app purchases, starting at $7.99 per month. fillin asks for nothing beyond the download.
Regimen ships an update every 9 days, fillin every 2 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | Regimen | fillin |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (574 ratings) — better | — |
| Positive reviews | 94.2% of reviews | — |
| Number of ratings | 574 — better | — |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 27 MB | 10 MB |
| Age rating | 12+ | 12+ |
| Developer | Awaken Labs LLC | Aimgonna Inc. |
In-app purchases
Regimen
- Regimen Premium14 Days trial$7.991 Month
- Regimen Premium Annual14 Days trial$49.991 Year
fillin
No in-app purchases









