Symptom Log vs Truly Simple Symptom Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Symptom Log
This app helps individuals manage chronic conditions by logging daily symptoms, moods, and potential triggers. It provides insights into trends and allows for easy sharing of health data with doctors. The app focuses on private, on-device storage for user peace of mind.
- Daily symptom logging
- Mood tracking
- Trigger identification
- Doctor reports (PDF)
- Data export (CSV)
- Customizable symptom list
- On-device data storage
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SymptomLog is a private daily diary for one person living with one long-term condition. Log how the day actually went in under a minute, then show your doctor a record instead of trying to remember. At setup you choose your condition — migraine, IBS and gut health, autoimmune, fibromyalgia, chronic pain, endometriosis, allergies, mental health, or something else — and your starting symptom list is built around it. WHAT ONE DAY LOOKS LIKE Tap the quick-log card on the home screen. Pick one of five moods, from Terrible to Great. Slide each symptom you track from 0 to 10. Tap anything that may have played a part: poor sleep, stress, weather change, a certain food, alcohol, exercise, a missed dose, menstrual cycle, dehydration, overexertion, travel, illness. Add a note if you want one, then save. That's the whole thing. The home screen shows your logging streak, your total days logged, and a week-at-a-glance strip, so you can see which days you missed and go back and fill them in. An optional reminder at a time you choose nudges you once a day. IT STAYS ON YOUR PHONE There's no account, no sign-up and no cloud sync. Your entries are stored on this device — no copy sits on a server, and nobody else can open your log. PREMIUM: TURN THE LOG INTO AN ANSWER • See the shape of it — trend lines, a severity breakdown, a calendar heatmap and your mood distribution across 7, 30 or 90 days. • Check your triggers — a frequency chart showing which triggers you tapped most over the period you chose. • Hand your doctor something readable — a full Doctor Report as a PDF, a single-symptom report, or a side-by-side comparison of two date ranges. • Keep the raw numbers — export everything as a CSV file. • Track what you actually have — add, remove and reorder your own symptoms. • Look back a full year instead of 30 days. You get a few minutes with your doctor. Spend them on the conversation, not on reconstructing the last three months out loud. GETTING STARTED Setup takes about a minute: choose your condition, choose the symptoms you want to start with, set a reminder if you'd like one. Daily logging and the last 30 days of history are included at no cost. Premium is available weekly or yearly, or as a one-time Lifetime purchase, whenever the charts and reports are worth it to you. The weekly and yearly plans are auto-renewing subscriptions, charged to your Apple ID at confirmation of purchase and renewing unless canceled at least 24 hours before the current period ends. Manage or cancel anytime in your account settings. A trial is offered on a plan only when your account is eligible for one. Lifetime is a single purchase with no recurring charge. Current prices are shown on the plan screen in your local currency. Terms of Use: https://sites.google.com/view/symptom-log/eula?authuser=0 Privacy Policy: https://sites.google.com/view/symptom-log/privacy-policy?authuser=0 SymptomLog is a personal tracking tool. It does not diagnose, treat or provide medical advice — always speak to a qualified healthcare professional about your health.
Truly Simple Symptom Log
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Truly Simple Symptom Log is built around a single conviction: health tracking should take seconds, not minutes. Most symptom trackers are overbuilt and cluttered with complicated graphs, gamification, mandatory onboarding, and subscriptions that make the act of recording how you feel a chore. This app strips all of that away. It features a calm, minimal, one-screen logging interface that feels closer to a personal journal than a medical tool. It’s perfect for people with chronic conditions, people exploring cause-and-effect with their health, or anyone who just wants a friction-free way to log their mood and symptoms and then move on with their day. There's an in-app purchase that allows you to lock the app and export your data, but all core features are available in the free version and can be used for free as long as you like. Features: • One-screen logging: Record your mood, symptoms, potential causes, and notes on a single page. No tabs or multi-step wizards. • Heatmap calendar: A color-coded monthly data view gives you an instant visual summary of how you've been feeling over time, so patterns become obvious at a glance. • Accessible by design: Enlarged, comfortable touch targets prevent mis-taps when you're not feeling well. Fully optimized for VoiceOver screen readers and scalable dynamic text for low vision. • iCloud Sync: Logs sync silently and automatically across your Mac, iPhone, and iPad. Status indicators let you know your data is secure at a glance. • Free core features: All core logging is completely free. A single one-time, lifetime purchase unlocks optional data exports and a biometric privacy lock.
Screenshots
Verdict
The clearest difference is update cadence: Symptom Log at every 2 weeks against Truly Simple Symptom Log's every 3 weeks. Symptom Log also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support 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. Symptom Log sells 3 in-app purchases, starting at $2.99 per 7 days and Truly Simple Symptom Log sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Symptom Log ships an update every 2 weeks, Truly Simple Symptom Log every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Symptom Log | Truly Simple Symptom Log |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 43 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | AlgoSoft Technologies Limited | Colin Wright |
In-app purchases
Symptom Log
- Weekly Plan$2.997 Days
- Annual Plan3 Days trial$39.991 Year
- Lifetime$89.99
Truly Simple Symptom Log
- Unlock Pro$4.99
Questions
Is Symptom Log free?
Is Truly Simple Symptom Log free?
Do Symptom Log or Truly Simple Symptom Log have ads?
Which is updated more often, Symptom Log or Truly Simple Symptom Log?
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