Open vs Tempus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open
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OpenHabit is a simple, focused habit tracker designed to help you build and maintain positive routines. Whether you want to exercise daily, read more books, or drink enough water, OpenHabit makes it easy to stay on track. FLEXIBLE SCHEDULING • Daily habits with custom targets (e.g., drink 8 glasses of water) • Weekly goals (e.g., exercise 3 times per week) • Specific days (e.g., meal prep on Sundays and Wednesdays) • Custom intervals (e.g., every 3 days) STAY MOTIVATED • Visual progress tracking • Streak counting to maintain momentum • Color-code your habits for quick recognition • Satisfying tap-to-complete interaction GENTLE REMINDERS • Set multiple reminders per habit • Customize notification times • Never forget your daily intentions PRIVACY FIRST • All data stored locally on your device • No account required • No cloud sync, no tracking, no ads • Your habits are your business SIMPLE BY DESIGN • Clean, distraction-free interface • Dark and light mode support • Fast and lightweight • Works completely offline OpenHabit respects your time and privacy. No complicated features, no subscription fees, no data collection. Just a straightforward tool to help you become the person you want to be, one habit at a time. Start your journey today.
Tempus
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Tempus turns showing up into something you can see. Every day you complete a habit lands as a colored square on a grid - and watching that grid fill up becomes the reason you don't stop. BUILT AROUND ONE IDEA Consistency should be visible. Habits live on grids that grow with you - calendar months or a continuous view, your choice. Miss a day and you'll see the gap. Show up and you'll see that too. YOUR DAY, AT A GLANCE The Today ring closes as you complete what matters. Your calendar events wrap around a 24-hour dial, so the whole day fits in one look. Link your existing calendars - Apple, Google, or any ICS feed. 1% A DAY, COMPOUNDED Finish what you planned and the day pays about 1%. Miss it and you give a little back. Rest days cost nothing. One number tracks all of it from the day you started - and there is no limit on it. REMINDERS WITH A PERSONALITY Pick the voice that actually works on you: gentle encouragement, pure hype, or tough love. Or write three example phrases and let AI generate notifications that sound exactly like the voice in your head - at the times you choose. TEN ATMOSPHERES Light or dark, and the whole app follows. Ten palettes, from warm dusk to true black - pick the one you want to look at every day. A PERFECT MONTH FEELS LIKE THIS Tap any month to relive it, day by day. Green squares all the way down. YOU SHAPE WHAT COMES NEXT Request features and vote on what gets built. Tempus is small, independent, and built with care - your voice genuinely steers it. FREE AND PRO Free: up to 3 habits, 1 linked calendar, all core tracking. Pro: unlimited habits, unlimited calendars, custom AI reminder voices. Monthly or annual, with a free trial. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends; manage anytime in your App Store settings. Privacy Policy: https://tempusapp.info/privacy Terms of Use: https://tempusapp.info/terms
Screenshots
Verdict
The clearest difference is in-app purchases: Open at none against Tempus's 2. Open also leads on iOS requirement (15.1 vs 18.0). On price, ads 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. Tempus sells 2 in-app purchases, starting at $3.99 per month. Open asks for nothing beyond the download.
| Parameter | Open | Tempus |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 6 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 37 MB | 17 MB |
| Age rating | 4+ | 9+ |
| Developer | Ryan Crabbe | Sofronie Albu |
In-app purchases
Open
No in-app purchases
Tempus
- Tempus Pro7 Days trial$3.991 Month
- Tempus Pro7 Days trial$24.991 Year









