Habit Heatmap vs Open Invite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Habit Heatmap
This app helps you build and track habits with a minimalist design and clear monthly heatmaps. Earn streaks, unlock badges, and sync your progress across devices. It offers a free version with an optional one-time upgrade.
- Monthly habit heatmaps
- Customizable habits and goals
- Streak and badge system
- iCloud sync across devices
- Dark mode support
- Customizable widgets
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Designed for absolute minimal effort and the maximum convenience so you can actually focus on what matters to you. What makes it different: - Ultra clear heatmap separated by months rather than displaying a single block for the whole year - Purist minimal design Key features: - Customise habits and set goals - Earn streaks and badges - ICLOUD sync and backup across IPAD/MAC/IPHONE - Full dark mode support - Customisable widgets with actions - Free version - No subscriptions Download for free. Upgrade for a one-time free.
Open Invite
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Welcome to Open Invite — the beautiful way to open .ics calendar files on iOS. • Tap to open calendar invitations from Mail, Safari, or Files • Preview events before adding with gorgeous invitation cards • Catch scheduling conflicts with visual timeline view • Choose which calendar to use for each event • Swipe through multi-event files as a card stack • Complete privacy — everything happens on-device Open Invite handles .ics files the way they should work — tap, preview, add. One second, not one minute. Stop forwarding calendar invites to yourself: Receive a meeting invitation in Mail, download an event from Safari, or find an .ics file in Files? Just tap it. Open Invite shows you a beautiful preview card with every detail — title, time, location, organizer, attendees, notes — so you can decide before it touches your calendar. SEE BEFORE YOU COMMIT Preview the full event as a beautiful invitation card. No more blind adds. No more calendar clutter from events you didn't mean to accept. CATCH CONFLICTS BEFORE THEY HAPPEN See a visual timeline of your day alongside the new event. Spot double-bookings before you commit. KEEP WORK AND LIFE SEPARATE Pick exactly which calendar to use. Client meetings go in Work, soccer games in Family. Just want speed? Basic access adds to your default calendar instantly. ONE TAP FROM ANYWHERE Works with Mail, Safari, Files, or any app that handles calendar files. Open Invite registers as a native file handler — no forwarding to yourself, no copy-pasting dates. MULTIPLE EVENTS? NO PROBLEM Some invites contain a full season schedule or conference agenda. Swipe through them like a card deck and add events one at a time. YOUR CALENDAR STAYS YOURS Everything happens on your iPhone. Zero cloud servers. Zero tracking. Zero accounts. Progressive calendar access means you choose what the app can see — write-only to add events, or full access for conflict detection and calendar selection.
Screenshots
Verdict
The clearest difference is update cadence: Habit Heatmap at every 3 weeks against Open Invite's every 7 months. Habit Heatmap also leads on iOS requirement (17.6 vs 26.0). On price, ads, in-app purchases 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. Habit Heatmap sells 1 one-off in-app purchase and Open Invite sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Habit Heatmap ships an update every 3 weeks, Open Invite every 7 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.
| Parameter | Habit Heatmap | Open Invite |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (10 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 3 weeks — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Hummingbird Labs Ltd | Christian Tietze |
In-app purchases
Habit Heatmap
- Premium$4.99
Open Invite
- Thank You$0.99
- Appreciation Tip$2.99
- Showing Support$4.99









