Calendar app *DeepBlack vs Interstate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calendar app *DeepBlack
Organize your schedule with a simple calendar, time, and to-do list. Add tasks and appointments with a touch, and visually distinguish events using customizable color-coding. This app offers a private way to manage your plans without needing to register.
- Daily task and appointment list
- Color-coded event decoration
- Customizable schedule creation
- Private, device-saved plans
- Simple touch interface
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Appointment book use as casual note. Organized plan in Calendar and Time and To-do list. Feature Overview Details [touch +] "Task" or "Appointment" added to "daily task list" [touch x] "Task" or "Appointment" deleted from "daily task list" [touch color bar] Calendar decorated by color Providing scheduling solutions in a few touch. Customization Calendar marks up by color that selected suitable for this calendar to define special event days. Appointment book app even not defined holiday according to the ordinary calendar. Can create schedule suite for your lifestyle. Also recommend to people that don't rest Saturday and Sunday. About appointment and task list date No need to register. You're secretly appointment or task list saved your device.
Interstate
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Interstitial journaling is a powerful way of reclaiming your focus. In a world where the things around us are constantly fighting for our attention, the moments between tasks are when we're most at risk of getting distracted. By using these moments to take note of what we were doing or what we want to do next, we can stop ourselves from losing focus, and save ourselves from having to think "what was I doing, again?". Interstate makes this easy by providing a clean and fast interface for logging and reviewing your time. FEATURES: - Made for iOS and iPadOS - Automatic timestamping - Keyboard shortcuts - Sync across devices with iCloud - No account necessary
Screenshots
Verdict
The clearest difference is iOS requirement: Calendar app *DeepBlack at 11.0 against Interstate's 26.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Calendar app *DeepBlack ships an update every 5 months, Interstate every 3 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | Calendar app *DeepBlack | Interstate |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 11.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 10 MB | 5 MB |
| Age rating | 17+ | 4+ |
| Developer | Bakerstreet Co., Ltd. | Ciaran Mulholland |
In-app purchases
Calendar app *DeepBlack
No in-app purchases
Interstate
No in-app purchases
Questions
Is Calendar app *DeepBlack free?
Is Interstate free?
Do Calendar app *DeepBlack or Interstate have ads?
Which is updated more often, Calendar app *DeepBlack or Interstate?
Other comparisons
