BioPocket vs Sundial
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BioPocket
Visualize your physical, emotional, intellectual, and intuitive cycles to understand daily energy, creativity, and decision-making patterns. Compare your rhythms with others to reveal harmony or potential tension. Use this tool for self-reflection and planning activities.
- Visualize physical, emotional, intellectual, and intuitive cycles
- Interactive charts with real-time updates
- Compare rhythms with friends and loved ones
- Dark and light themes with customizable curves
- Smart navigation for past and future exploration
- Universal app for iPhone, iPad, and macOS
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BioPocket – Explore Your Inner Rhythms Discover how your physical, emotional, intellectual and intuitive cycles shape your daily life. BioPocket helps you visualize your biorhythms through elegant, interactive charts designed for iPhone and iPad. Track your highs, lows, and critical days to better understand your energy, creativity, and decision-making patterns. Compare your rhythms with friends or loved ones and reveal moments of harmony or potential tension. Key Features • Beautiful interactive charts with real-time updates • Four core cycles: Physical (23 days), Emotional (28 days), Intellectual (33 days), Intuitive (38 days) • Compare your biorhythms with other people • Dark & light themes, smooth animations, customizable curves • Smart navigation: swipe to explore past and future days • Universal app for iPhone, iPad and macOS A Legacy of Insight Originally launched in 2003 for Pocket PC and ported to iPhone in 2011, BioPocket is one of the longest-running biorhythm apps on iOS - now fully redesigned for iOS 17 and beyond, with a refined, modern interface and enhanced accuracy. Worldwide Recognition BioPocket has been enjoyed by users around the globe for over two decades. Ranked among the Top 10 Healthcare & Fitness apps in more than 25 countries, including: • #1 in Belgium • #1 in China • #3 in Netherlands – Bedankt! • #6 in Russia • #7 in USA Consistently ranked in the Top 10 worldwide since 2011 — and still loved in 2025. Understand Yourself, Every Day Use BioPocket to: • Plan creative or physical activities during your high periods • Recognize low phases to rest and recharge • Identify your critical days and stay balanced • Explore compatibility patterns with the people around you Note: Biorhythms are a form of pseudoscience and should be used for entertainment and self-reflection only. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Sundial
This app helps you manage your screen time by setting limits on app usage. It uses iOS's built-in blocking features and provides insights into your daily usage patterns. The app focuses on a more natural approach to time management, offering flexibility within set boundaries.
- App and category limits
- Customizable rule reasons
- Flexible exit options
- Daily health score visualization
- Usage history heatmap
- Home Screen widget
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Sundial is a screen time app built on one idea: a limit should feel like a sundial, not a stopwatch. You decide what your time is for, and the app quietly holds the line. LIMITS THAT ACTUALLY SHIELD Choose the apps or categories that eat your day and give each rule a daily allowance. When it runs out, iOS itself blocks the app — not a timer you can swipe away. One rule can hold any number of apps at once. THE BLOCK TELLS YOU WHY Every shield says what you finished ("30 min done for today.") and repeats the reason you set that rule — "For my health. Put the phone down." The exit stays yours as well: finish for today, take 15 more minutes, or lift that rule until midnight. Nothing is a dead end. TODAY, AT A GLANCE The home tab estimates how much of the day you have spent and turns it into a health score that drains as the hours do. The day's ink-wash landscape shifts with it, so the picture tells the story before the number does. HISTORY WORTH READING All history in one heatmap, plus a per-day breakdown of where the time went: which apps, which categories, and how they compare with your limits. THE HOME SCREEN WIDGET Today's figure and your most urgent rules, small or medium, right on the Home Screen. QUIET BY DESIGN Everything stays on your iPhone. No account, no server, no analytics, no ads. Sundial reads only aggregate usage time through Apple's Screen Time framework — never what you do inside an app. Full policy: see the Privacy Policy link below. SUNDIAL PRO A single one-time purchase unlocks every theme, every background scene, and the Home Screen widget. No subscription. REQUIREMENTS Sundial needs Screen Time permission (Settings → Screen Time → Sundial) to read your totals and set limits. iPhone.
Screenshots
Verdict
The clearest difference is review sentiment: Sundial at 100% against BioPocket's 0%. Sundial also leads on update cadence (every 10 days vs every 3 weeks). BioPocket's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.5). On price, ads, in-app purchases and monetization model 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. BioPocket sells 2 in-app purchases, starting at $1.99 per year and Sundial sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
BioPocket ships an update every 3 weeks, Sundial every 10 days. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.
| Parameter | BioPocket | Sundial |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 4 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Miguel Vanhove | 潇 左 |
Customer experience
BioPocket
Sundial
In-app purchases
BioPocket
- BioPocket Premium — Yearly$1.991 Year
- BioPocket Premium - Lifetime Access$8.99
Sundial
- Sundial Pro$4.99









