911PROTECTOR vs Health Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
911PROTECTOR
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911 PROTECTOR is the fastest way to call 911. All you need to do is click the “Yes” button and you will be immediately connected to the 911 operator. In addition, if you are walking alone at night (on campus, a dark street, or parking lot) and feel you are being followed, we have included an emergency button called "Police Siren". It is designed to deliver a powerful police siren blast that could cause a stockier to think you have called the police and run away. No fumbling around to dial an emergency number, just click the “Yes” button. In addition, if for any reason you feel threatened please click the Police Siren button. You are NOT alone! 911 PROTECTOR can help you stay safe.
Health Diary
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Health Diary helps you write how your body feels, turn everyday notes into clear health records, and get small actions you can actually finish today. Remembering your health story shouldn’t be hard. Most “health” apps focus on steps, workouts, and heart rate, or require long forms to fill out. Helpful, but not always useful when you’re dealing with everyday discomfort, low energy, poor sleep, stress, or small changes in how your body feels. Health Diary focuses on what matters: how you feel, what might be affecting it, what you can do today, and how it changes over time. Write naturally, just like a diary: “My head felt heavy this morning and got worse in the afternoon. I rested for 20 minutes, which helped a bit.” No long forms. No endless lists. Just write how your body feels in your own words. Health Diary can organize the important parts for you, including the main issue, body areas, severity, timing, duration, related sensations, possible triggers, and what helped. KEY FEATURES 1. Today Plan Start with a quick check-in, then get a few small actions you can actually finish today. Today Plan may suggest small, concrete actions like: • Walk for 10 minutes after dinner • Add protein to your next meal • Take a 3-minute breathing break • Log mood, energy, sleep, or discomfort before bed Connect Apple Health to make Today Plan more relevant with sleep, steps, workouts, and weight. 2. Natural-language health diary Record how you feel with just a few sentences. Health Diary helps turn your daily body notes into clear, structured records. 3. Useful statistics, not just step counts See patterns that are easier to miss from memory: • Most affected body areas • Common triggers • Severity changes over time • Recording frequency and high-symptom days • Flexible date ranges 4. Trend summaries that make sense Generate easy-to-read summaries for different time ranges, including recent patterns, key takeaways, weather factors, and next steps for self-reflection. 5. Doctor-ready timelines Choose a time range and review a clean timeline of what happened and when. Filter by severity, body area, trigger, weather, or other details so you can prepare for appointments with less guesswork. PERFECT FOR • Building daily awareness of your body • Turning vague discomfort into clear notes • Following small health actions each day • Spotting patterns over time • Preparing for doctor visits • Keeping a private health story you can look back on PRIVACY-FIRST Your diary is designed to stay private and personal. Your health notes are stored on your device. Optional features such as AI summaries, weather, Apple Health, and purchases use only the data needed to provide those features. ABOUT PRO FEATURES Health Diary offers optional Pro features with monthly, yearly, or lifetime access. Pro unlocks more complete Today Plans, advanced trend reports, enhanced doctor-ready timelines, and additional tools to help you understand your health more clearly. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://healthdiary.cc/privacy Note: Health Diary is for personal tracking and awareness only. It does not provide medical diagnosis, treatment, or professional medical advice.
Screenshots
Verdict
The clearest difference is in-app purchases: 911PROTECTOR at none against Health Diary's 3. 911PROTECTOR also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.6). Health Diary's advantage is update cadence (fortnightly vs every 2 months). On price 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. Health Diary sells 3 in-app purchases, starting at $3.99 per month. 911PROTECTOR asks for nothing beyond the download.
911PROTECTOR ships an update every 2 months, Health Diary fortnightly. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.
| Parameter | 911PROTECTOR | Health Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 5 MB | 17 MB |
| Age rating | 12+ | 4+ |
| Developer | LifeGuard Global Inc. | 鲁 黄 |
In-app purchases
911PROTECTOR
No in-app purchases
Health Diary
- Health Diary Pro Monthly$3.991 Month
- Health Diary Pro Yearly7 Days trial$19.991 Year
- Health Diary Pro Lifetime$59.99








