Comparison

CatAche Diary vs SymptomLog

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

Head to head
About

CatAche Diary

Features
Read full description

A cat can't cure your headache โ€” but it might just make it easier to bear. CatAche is a simple, friendly headache diary that helps you log and track your headache episodes โ€” so you can start to understand your patterns and take back control. No sign-up. No account. No fuss. Just you, your data, and a cat who cares. Use it for free for logging 10 episodes. If you like the app, upgrade to Premium and get unlimited episodes. What you can do: โ€ข Log headache episodes quickly and easily โ€ข Record the date and details of each episode โ€ข Track your history over time โ€ข Spot patterns to better understand your headaches Why CatAche? Headaches are no fun โ€” but your diary doesn't have to be miserable. CatAche brings a little feline warmth to an otherwise frustrating experience. Because cats make everything better. ? Your privacy, always: All your data stays on your device. Nothing is sent anywhere, ever. Simple. Private. A little bit cat-shaped. Download CatAche and start understanding your headaches today. CatAche is a personal tracking tool and does not provide medical advice.

About

SymptomLog

Features
Read full description

Log every symptom, flare, medication, and trigger in under 5 seconds โ€” no setup overwhelm, no freezing, no blank screen when you feel worst. Built for lupus, fibromyalgia, CFS, POTS, endometriosis, and all autoimmune conditions. Analytics show your trigger patterns and help you prepare for appointments. Track sleep alongside symptoms. Export a full health timeline to share with your doctor. Not just a diary โ€” an analytical engine that works on your worst days. Terms of Use: https://docs.google.com/document/d/e/2PACX-1vQdEtKDnCjuEDWelsB_wM-TjZAkXYh9ySPqfApocJcf4VjOaZX7NLnHqF0K46oGEhyfIsls3yvEDiPN/pub

Screenshots

CatAche Diary4 screens
SymptomLog4 screens

Verdict

The call

The clearest difference is ads: CatAche Diary at none against SymptomLog's shown. CatAche Diary also leads on iOS requirement (13.0 vs 17.6). SymptomLog's advantage is update cadence (every 2 days vs every 4 days). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. CatAche Diary sells 1 one-off in-app purchase and SymptomLog sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CatAche Diary ships an update every 4 days, SymptomLog every 2 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard3 real differences ยท 3 level
CatAche Diary versus SymptomLog: the parameters behind the verdict, then further details
ParameterCatAche DiarySymptomLog
PriceFreeFree
Update frequencyEvery 4 daysEvery 2 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 โ€” better17.6
Further details โ€” not scored
Size27 MB17 MB
Age rating4+4+
DeveloperStefanus van de WeteringSajith Lal m k

In-app purchases

1 purchases

CatAche Diary

One-time1
  • Premium Upgrade$1.99
3 purchases

SymptomLog

Subscriptions2
  • SymptomLog Monthly7 Days trial$2.991 Month
  • SymptomLog Annual7 Days trial$14.991 Year
One-time1
  • SymptomLog Lifetime$24.99

Questions

Is CatAche Diary free?
CatAche Diary is free to download, with in-app purchases available.
Is SymptomLog free?
SymptomLog is free to download, with in-app purchases available.
Do CatAche Diary or SymptomLog have ads?
SymptomLog shows ads; CatAche Diary does not.
Which is updated more often, CatAche Diary or SymptomLog?
CatAche Diary ships an update every 4 days, and SymptomLog every 2 days. Most recently, CatAche Diary was updated on October 24, 2026 and SymptomLog on October 28, 2026.

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