Comparison

PillDiary vs Knot Diary

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

Head to head
About

PillDiary

Features
Read full description

PillDiary – Medicine as Memory PillDiary is a simple, photo-based diary for your medication. Not a reminder. Not a checklist. Instead, it is a reliable way to record each pill you take β€” one photo at a time. Why PillDiary? β€’ Visual Proof Every dose is recorded with a photo, so you always know you took it. No more guessing, no more doubt. β€’ Daily Log Your medication history is displayed in a clean calendar view. Scroll back in time to see your complete record at a glance. β€’ Trust and Sharing PillDiary creates a trustworthy history that can be shared with doctors or loved ones. It’s not just data β€” it’s evidence. β€’ Private and Secure Your records belong to you. PillDiary keeps your diary private, with optional cloud backup for extra safety. Premium Features Upgrade to PillDiary Premium for more powerful tools: β€’ Cloud backup & multi-device sync β€’ Long-term storage of your photo history β€’ Export logs to PDF or CSV β€’ Family sharing: check your loved ones’ medication record β€’ High-resolution photo support Who is PillDiary for? β€’ Anyone who needs to track long-term medication β€’ Families supporting elderly parents with daily medication β€’ Patients preparing records for their doctors β€’ People who want a simple, non-intrusive way to manage health PillDiary is not about telling you when to take your pills. It’s about remembering that you did. VIP Premium Features β€’ Unlimited Records: Break through free version limits, record more medication information Terms & Privacy Before using this app, please carefully read our terms of service and privacy policy: β€’ Terms of Service: https://timehound.vip/pilldiary/terms-of-service-en.html β€’ Privacy Policy: https://timehound.vip/pilldiary/privacy-policy-en.html

About

Knot Diary

Features
Read full description

Human emotions are extremely complex, just like a tangled ball of yarn. In Knot Diary, you can write down your emotions and what happens every day, just like a regular diary. Tie a knot on the yarn β€” whether you are happy or sad, no matter what emotion it is, you can record it all. Your records will grow bigger and bigger, like a ball of yarn. Don't forget to tap the yarn to unroll it and review your records! Knot Diary also supports customizing the style of your hand-drawn knots β€” don't forget to try this feature. Knot Diary welcomes your use. If you run into any problems while using it, feel free to leave us a message, and I will keep improving. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PillDiary4 screens
Knot Diary4 screens

Verdict

The call

The clearest difference is update cadence: Knot Diary at every 11 days against PillDiary's monthly. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. PillDiary sells 5 in-app purchases, starting at $1.99 per month and Knot Diary sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PillDiary ships an update monthly, Knot Diary every 11 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

Scorecard1 real difference Β· 5 level
PillDiary versus Knot Diary: the parameters behind the verdict, then further details
ParameterPillDiaryKnot Diary
PriceFreeFree
Update frequencyMonthlyEvery 11 days β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad β€” better
Requires iOS17.017.0
Further details β€” not scored
Size34 MB3 MB
Age rating4+4+
Developerζ­ε·žεΌ•εŠ›η½‘η»œζŠ€ζœ―ζœ‰ι™ε…¬εΈζ‘ƒθŠ± 秦

In-app purchases

5 purchases

PillDiary

Subscriptions2
  • Monthly VIP$1.991 Month
  • Annual VIP$6.991 Year
One-time3
  • Month VIP$2.99
  • Lifetime VIP$12.99
  • Annual VIP$24.99
3 purchases

Knot Diary

Subscriptions3
  • Knot Diary Pro (Monthly)$0.991 Month
  • Knot Diary Pro (Quarterly)$2.993 Months
  • Knot Diary Pro (Yearly)$6.991 Year

Questions

Is PillDiary free?
PillDiary is free to download, with in-app purchases available.
Is Knot Diary free?
Knot Diary is free to download, with in-app purchases available.
Do PillDiary or Knot Diary have ads?
Neither PillDiary nor Knot Diary shows ads.
Which is updated more often, PillDiary or Knot Diary?
PillDiary ships an update monthly, and Knot Diary every 11 days. Most recently, PillDiary was updated on October 7, 2026 and Knot Diary on October 6, 2026.

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