Comparison

SickPredict™ vs Chronic Friends

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SickPredict™

This app leverages data from your Apple Watch to predict potential health changes up to 72 hours in advance. It calculates a personalized 'SickNumber™' and tracks your health metrics over time, providing alerts for risk level changes. It is intended for general wellbeing and informational purposes only.

Highlights
  • Predicts health changes up to 72 hours in advance
  • Calculates personalized SickNumber™
  • Tracks health changes over time
  • Provides periodic risk level alerts
  • Integrates with Apple Health data
  • Uses machine learning algorithms
Read full description

Requires an Apple watch and iPhone. Experience the future of personalized health! Based on tested scientific research and data from your Apple watch, the SickPredict™ App calculates, in real-time, your personalized SickNumber™ to help anticipate any upcoming changes in your health up to 72 hours in advance of experiencing any symptoms! Your personalized SickNumber™ is based on the specific health metrics gathered from your Apple watch. Key features: 1. Anticipates changes in your health up to 72 hours before you show symptoms! Research-tested, we can now predict oncoming illness with reasonable accuracy. Keep in mind, it is not perfect, but the scientific results have been conclusive in using certain data collected by your Apple watch to proactively identify potential changes in your health. 2. Track your health changes over time. Use this app to calculate your daily SickNumber™ and track your history. This app uses machine learning algorithms to track changes in your SickNumber™ over time. 3. Receive periodic alerts. The SickPredict™ app sends you daily notifications of your SickNumber™ and changes in your risk level. How It Works Over the past several years, research studies have been conducted involving more than 100,000 people wearing smart watches and the results were very positive, showing strong levels of accuracy in the ability to predict illness from health data that was recorded by the wearables. This app integrates with Apple Health and uses a multitude of data that is provided by your wearable everyday such as Active Energy, Body Temperature, Heart Rate, Heart Rate Variability, Oxygen Saturation, Resting Energy, Steps, Resting Heart Rate, Sleep Data and more. The SickPredict™ App calculates, in real-time, your personalized SickNumber™. The daily SickNumber™ ranges from 1-10 to help anticipate any upcoming changes in your health. Here are the SickNumber™ risk levels: o Low risk is 1-4 o Medium risk is 5-7 o Elevated risk is 8-10 Suggestions/Comments • Although it is not required to use your wearable at night, it is highly recommended. The results are significantly better if you consistently wear your watch at night and consistently throughout the day. • Remember, do not rely on the SickPredict™ App for medical advice or diagnosis. The App is not a replacement or substitute for professional medical care. Use the App for informational, general wellbeing purposes only. Always consult your health professionals if you have any health concerns. Subscriptions Payment will be charged to the credit card connected to your iTunes account after your trial period ends and when your subscription starts. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the trial period or current subscription period. The subscription options for the Basic Access subscription include either a $3.99/month monthly fee or $28.99/ year annual fee. Both include a free 1 week trial. Manage your subscription by going to your Account Settings on your iPhone. Additional Information: Visit www.SickPredictApp.com Terms of Use: Visit https://sickpredictapp.com/terms-of-use/

About

Chronic Friends

Features
Read full description

Living with a chronic condition can feel lonely and hard to explain. Chronic Friends gives you one warm, private place to record how you really feel, see your own patterns, and connect with people who truly understand — because they live it too. Chronic Friends is dedicated exclusively to chronic illness. It supports Crohn's disease, ulcerative colitis, IBS, rheumatoid arthritis, fibromyalgia, psoriasis, endometriosis, asthma, COPD, diabetes, chronic fatigue (ME/CFS), migraine, anxiety, depression and many more — around 50 conditions in total, organized by body system, so you only see the trackers that matter to you. Living with more than one condition? Follow several at once. YOUR DAILY CHECK-IN • One quick journal a day: pain, energy, sleep, food, movement, mood and more • Extra questions adapted to your conditions: joints, skin, eyes, digestion, breathing, pelvic health, mind • A calendar that shows good days and hard days at a glance SEE YOUR OWN PATTERNS • Clear charts of everything you log, over weeks, months or years • My Flare Radar brings your recent entries together in one visual — a conversation starter for your next appointment, never a diagnosis • Download a PDF health report to share with your doctor — free for everyone MEDICATION, UNDER CONTROL • Reminders with their own long alarm sound, repeated up to three times until you answer • Mark each dose as taken or skipped, see your adherence, and get a heads-up when supplies run low FLARE MODE — FOR THE HARD DAYS • One tap turns the app into a calmer, quieter space • Gentle quick-logs, an emergency info card and a flare report you can download — all free • Breathing and grounding tools (Meditation) and offline games (Entertainment) are part of Premium • When it passes, your notes are saved for your next hard day A COMMUNITY THAT GETS IT • Share experiences and encouragement with people who understand • Kind by design: peer experiences, not medical advice FOOD JOURNAL • Log meals in seconds and scan product barcodes to look them up (Premium) • Build your own private list of foods that sit well with you PREMIUM Chronic Friends is free to use — including the community, the full journal, medication reminders, connecting Health Sync and every PDF report. Premium unlocks four things: Food Scan, Tools, Meditation and Entertainment. • Monthly $7.99 · 6 months $29.99 · Yearly $49.99 · Lifetime $149.99 (one-time) • 30-day free trial on recurring plans Prices may vary by region; the final price is always shown in the store before you buy. YOUR DATA IS YOURS We never sell your data and never use it for advertising. You can export or delete everything at any time. Privacy: https://www.chronicfriends.org/privacy/ Terms: https://www.chronicfriends.org/terms/ IMPORTANT — PLEASE READ Chronic Friends is a wellness, self-tracking and community tool for adults (18+). It is not a medical device and does not provide medical advice, diagnosis or treatment. Charts, the radar and any AI-generated summaries only visualize and describe the data you enter yourself — they do not predict, diagnose or detect any disease. Always consult your doctor or a qualified health professional with any questions about your health, and never disregard professional medical advice because of something you saw in the app. In an emergency, call your local emergency services. We don't wait for good days — we build them.

Screenshots

SickPredict™4 screens
Chronic Friends4 screens

Verdict

The call

The clearest difference is ads: Chronic Friends at none against SickPredict™'s shown. Chronic Friends also leads on update cadence (every 8 days vs every 2 months). SickPredict™'s advantage is iOS requirement (13.0 vs 15.1). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SickPredict™ sells 2 in-app purchases, starting at $3.99 per month and Chronic Friends sells 4 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SickPredict™ ships an update every 2 months, Chronic Friends every 8 days. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
SickPredict™ versus Chronic Friends: the parameters behind the verdict, then further details
ParameterSickPredict™Chronic Friends
PriceFreeFree
Rating4.1 (30 ratings) — better—
Positive reviews73.1% of reviews—
Number of ratings30 — better—
Update frequencyEvery 2 monthsEvery 8 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size58 MB51 MB
Age rating17+17+
DeveloperHealth Logic GlobalGerard Mir Ferrera

In-app purchases

2 purchases

SickPredict™

Subscriptions2
  • Basic Access7 Days trial$3.991 Month
  • Basic Access7 Days trial$28.991 Year
4 purchases

Chronic Friends

Subscriptions3
  • Premium Monthly1 Month trial$19.991 Month
  • Premium 6 Months1 Month trial$87.996 Months
  • Premium Yearly1 Month trial$167.991 Year
One-time1
  • Premium Lifetime$599.99

Questions

Is SickPredict™ free?
SickPredict™ is free to download, with in-app purchases available.
Is Chronic Friends free?
Chronic Friends is free to download, with in-app purchases available.
Do SickPredict™ or Chronic Friends have ads?
SickPredict™ shows ads; Chronic Friends does not.
Which is updated more often, SickPredict™ or Chronic Friends?
SickPredict™ ships an update every 2 months, and Chronic Friends every 8 days. Most recently, SickPredict™ was updated on October 6, 2026 and Chronic Friends on October 9, 2026.

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