Lupus Tracker vs Gretl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lupus Tracker
This app helps individuals manage lupus by tracking symptoms, medications, and potential triggers. It visualizes patterns to aid in understanding flares and improving communication with healthcare providers. Supports various lupus types and related autoimmune conditions.
- Symptom tracking with severity and notes
- Medication reminders and adherence tracking
- Flare tracking with triggers and dates
- Apple Health integration for biometrics
- Report generation for doctor visits
- Multi-profile support for caregivers
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Living with lupus means dealing with uncertainty. One day you're fine, the next you're hit with pain, rashes, brain fog, fatigue, or swelling that seems to come out of nowhere. You try to remember what you ate, how you slept, whether you took your meds, or the weather. But without a system, it's impossible to keep it all straight. Our Lupus tracker app helps you bring order to the chaos and spot the patterns hiding in plain sight. TRACK SYMPTOMS, FASTER Use the built-in symptom tracker to log pain, fatigue, joint stiffness, swelling, rashes, fevers, mouth sores, mood changes, lupus depression, brain fog, and more. Entries take seconds. Customize severity ratings, attach notes, add photos, and track multiple symptoms each day. No paper journals, no spreadsheets, no guessing. FOLLOW YOUR MEDICATION PLAN Keep your lupus treatment plan on track. If prednisone, hydroxychloroquine, or methotrexate is part of your plan, add the dose, schedule, and notes. The same flexible log works for azathioprine, rituximab, Benlysta, Plaquenil, injections, infusions, supplements, and other medications. Set reminders for specific times, receive alerts, and record missed or late doses. Get refill reminders before you run out. The medication tracker supports simple and complex regimens and adjusts across time zones when you travel. RECOGNIZE FLARE PATTERNS A flare, sometimes called a lupus attack, is easier to handle when you catch it early. The flare tracker lets you record flare start and end dates, suspected triggers, and associated symptoms. Over time, you can see how flares relate to sleep, skipped meds, hormone shifts, or environmental factors. Knowing what came before a flare gives you the power to respond sooner and prevent escalation. CONNECT WITH YOUR BODY Sync with Apple Health to bring in step count, heart rate, oxygen levels, sleep, weight, blood pressure, and menstrual cycle tracking. All of this data appears on your health timeline alongside symptom logs and medication history. You start to see what leads up to flares and what helps recovery. TYPES OF LUPUS SUPPORTED Pair it with resources from your lupus foundation, lupus association, or lupus society. It covers all major types, including: - Systemic lupus erythematosus (SLE) - Cutaneous lupus (discoid and subacute) - Lupus nephritis - Drug-induced lupus It also supports overlap conditions and related autoimmune diseases like: - Fibromyalgia - Rheumatoid arthritis (RA) - Sjögren's syndrome - Hashimoto's or Graves' disease - Chronic Fatigue Syndrome (CFS) SHARE REPORTS EASILY Export daily or weekly reports as PDFs or CSV files. Use them to guide conversations with your rheumatologist or specialist. Show trends, medication adherence, flare frequency, and day-to-day impact without relying on memory. DESIGNED FOR REAL LIFE - Track symptoms, meds, flares, and more in one place - Sync with Apple Health for seamless biometric data - Manage profiles for multiple people (perfect for caregivers) - Secure your data with Face ID, passcode, and encrypted cloud backup - Simple enough for teens and parents, powerful enough for complex cases MAKE IT YOUR OWN Build a routine with Lupus Tracker, free from rigid templates. Track your own health, support a family member, or bring clearer records to appointments. One user says, "It helps me manage my lupus without the guesswork." Export a summary for a flare, a lupus crisis, or a routine visit. It is not just tracking. It is about making your health easier to understand, manage, and explain. Newly diagnosed? We help you start your lupus journey strong. If you have been managing lupus for years, it helps you go deeper, spot overlooked triggers, and build a smarter routine. Any insights provided by Lupexa do not constitute medical advice. The app is designed for tracking purposes only and is not intended to diagnose, treat, cure, or prevent any disease or condition. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Gretl
This app acts as a personal health coach, focusing on trends rather than daily judgments. It allows users to log meals in plain language or by photo, automatically calculating calories and macros. It provides gentle, optional coaching and tracks various health metrics without shame or guilt.
- Log meals in plain words or by photo
- Automatic calorie and macro calculation
- Trend-based health tracking
- Optional personalized coaching
- Track weight, workouts, water, and cholesterol
- Voice logging on smartwatches
- Private by design with data export
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Track every breadcrumb. Gretl isn't a calorie counter that scolds you. It's a personal health coach that reads the trend instead of judging your day. Tell it what you ate in your own words — "two eggs and toast, and a coffee" — and Gretl does the arithmetic, follows the direction you're heading, and offers gentle, optional coaching. No streaks to break. No shame, ever. LOG IN PLAIN WORDS Describe a meal the way you'd say it out loud, or snap a photo of the plate. Gretl turns it into calories and macros — no database to search, no barcodes to scan, no portion dropdowns. Save the meals you repeat and log them again in one tap. Ate half? Adjust it in a tap. TRENDS, NOT VERDICTS One big dinner isn't a failure and one light day isn't a win. Chart your last 7, 14 or 30 days and watch the direction instead of the noise. Your calorie and macro targets start from the Mifflin-St Jeor equation and adapt to the energy balance your own data shows — arithmetic, not vibes. The numbers are deterministic; the coach interprets them, it never invents them. When a target should move, Gretl asks first. A COACH, WHEN YOU WANT ONE Ask a question, log by chatting, or get an honest read on how your week is going. It's there when you want it and quiet when you don't. Everything that costs us nothing is free forever — logging, history, trends, weigh-ins, water, the watch apps, export. Gretl Pro is an optional subscription that raises your daily coaching allowance. ON YOUR WRIST Log by voice from Apple Watch or Wear OS, or just ask Siri — no phone needed. Today's rings are one glance away. MEALS AREN'T MORAL EVENTS This is the whole philosophy. No shame language, anywhere. No "you blew it" notifications. No nagging. Gretl is a tool you open when you want it, not something that pesters you. It reduces the decision fatigue around eating while keeping you fully in control. TRACK WHAT MATTERS TO YOU — AND ONLY THAT • Meals, from plain words or a photo • Weight, as a trend instead of daily noise • Workouts and activity • Water — on by default, off in a tap • Cholesterol — off by default, on if you care Turn one off and it's gone everywhere: the home screen, your charts, the watch, its reminders. Your history is kept, so turning it back on brings it all back. NOTIFICATIONS YOU ASKED FOR Every reminder ships off. Turn on food or water reminders at times you choose, and nothing else ever fires — no streaks, no guilt, nothing because you went quiet. PRIVATE BY DESIGN Your data is yours: export it whenever you like, and erase yourself completely from Settings → Delete account, which removes your account and everything in it. NOT MEDICAL ADVICE Gretl offers decision support, not medical advice. For eating disorders, diabetes, medications, or unsafe goals, please talk to a qualified professional. Gretl is built to defer to one when it matters. Follow your breadcrumbs. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://gretl.ai/terms Privacy Policy: https://gretl.ai/privacy
Screenshots
Verdict
The clearest difference is review sentiment: Gretl at 100% against Lupus Tracker's 0%. Gretl also leads on rating (5.0 vs 3.9) and update cadence (every 4 days vs every 4 months). Lupus Tracker's advantage is ratings volume (21 vs 2) and device support (4 vs 2). On price, ads, in-app purchases and monetization model 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. Lupus Tracker sells 14 in-app purchases, starting at $4.95 per month and Gretl sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
Gretl holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Lupus Tracker has 21 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Lupus Tracker's written reviews are positive against 100% of Gretl's.
Lupus Tracker ships an update every 4 months, Gretl every 4 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.
| Parameter | Lupus Tracker | Gretl |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (21 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 21 — better | 2 |
| Update frequency | Every 4 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 15.5 — better | 16.4 |
| Further details — not scored | ||
| Size | 219 MB | 72 MB |
| Age rating | 4+ | 17+ |
| Developer | Digital Therapeutics | Andr3s LLC |
Customer experience
Lupus Tracker
Gretl
In-app purchases
Lupus Tracker
- flex pass$4.951 Month
- easy pass$5.997 Days
- flex pass$8.991 Month
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- weather max$9.993 Months
- yearly access$19.991 Year
- smart pass$24.991 Year
- Premium Yearly$29.991 Year
- limited sale$29.991 Year
- limited discount$34.991 Year
- Extended Trial3 Days trial$39.991 Year
- yearly access3 Days trial$39.991 Year
- 7-Day Trial7 Days trial$49.991 Year
- store credit$1.99
- lifetime upgrade$119.99
Gretl
- Gretl Pro Monthly$7.991 Month
- Gretl Pro Yearly7 Days trial$34.991 Year
Questions
Is Lupus Tracker free?
Is Gretl free?
Which has better reviews, Lupus Tracker or Gretl?
Do Lupus Tracker or Gretl have ads?
Which is updated more often, Lupus Tracker or Gretl?
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