BP 4DAT vs DiaryQ
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
BP 4DAT
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Take control of your blood pressure routine with a simple, focused tracker built for everyday use. Blood Pressure helps you record systolic, diastolic, and pulse readings in seconds, then turns your data into clear insights you can actually use. Review your latest category, follow your trends, and stay consistent with reminders that match your schedule. FEATURES β’ Fast logging Save blood pressure and pulse readings quickly with date and time details. β’ Clear overview dashboard See your latest reading, averages, and current category at a glance. β’ Trend statistics Review 7-day, 14-day, and 30-day periods with visual charts and summary metrics. β’ Reading details Open any record to view values, category, and timestamp in one place. β’ Flexible reminder plans Create reminder schedules, choose active days, and set multiple check times (for example, morning and evening checks). β’ Simple, clean design Stay focused on your health data without clutter. Blood Pressure is designed for personal tracking and awareness over time. Privacy Policy: https://bp4dat.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
DiaryQ
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Just text your day like you're messaging a friend. Tap "Make Diary" at night, and AI turns your notes into a real diary entry. - CHAT-STYLE JOURNALING THAT STICKS Send quick one-liners whenever you have a moment. An AI assistant chats back, so it feels like a conversation, not a chore. You're always chatting with an AI that runs on your iPhone β never another person. - AI WRITES IT UP Your scattered notes become a natural, readable diary entry. Edit it right there if you like. - CALENDAR LOOKBACK Tap any date to read and edit that day's entry. Missed a day? Generate it later from that day's chat. - COMPLETELY PRIVATE Your chats, your diaries, and even the AI itself stay on your iPhone. Nothing is ever sent to a server. No account needed. Chats and diaries are written by Apple Intelligence (the model built into your device), so there is nothing extra to download. On iPhones without Apple Intelligence (iOS 26 or later), you can add an optional on-device diary AI (about 340 MB). Without AI, chat logging, manual writing, and calendar review all still work. Switch the display language in the app (English / ζ₯ζ¬θͺ / ηΉι«δΈζ).
Screenshots
Verdict
The clearest difference is in-app purchases: DiaryQ at none against BP 4DAT's 2. DiaryQ also leads on update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement 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
Both are free to download. BP 4DAT sells 2 in-app purchases, starting at $2.99 per month. DiaryQ asks for nothing beyond the download.
BP 4DAT ships an update every 2 months, DiaryQ every 3 days. The most recent releases landed on August 6, 2026 and October 12, 2026 respectively.
| Parameter | BP 4DAT | DiaryQ |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 days β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 18.0 | 17.0 β better |
| Further details β not scored | ||
| Size | 3 MB | 31 MB |
| Age rating | 17+ | 4+ |
| Developer | 4DAT LLC | Takeaki Hashimoto |
In-app purchases
BP 4DAT
- Premium Monthly$2.991 Month
- Premium Yearly$29.991 Year
DiaryQ
No in-app purchases





