Calendar app *DeepBlack vs One Source X
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.
One Source X
This app offers an all-in-one platform for business communication and lead management. It streamlines operations from lead capture and nurturing to engagement and payment collection. Optimize your business potential with a unified toolset.
- Lead capture (landing pages, forms, inbound calling)
- AI Bot and pipeline management
- Multi-channel messaging (voicemail, SMS, email, FB Messenger)
- Payment collection
- Appointment setting
- Performance analytics
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Experience the future of efficient business communication and lead management with One Source X innovative app. We believe in empowering businesses with an integrated platform that eradicates the need to juggle multiple tools. Say goodbye to patchwork solutions and hello to a streamlined approach. From capturing leads with our intuitive landing pages, forms, and inbound calling system to nurturing them through our AI Bot and pipeline management feature, we’ve got you covered. Our platform doesn’t stop there. Engage your leads with our diverse messaging features, be it via voicemail, SMS, emails, or FB Messenger. Furthermore, our built-in functionalities allow you to effortlessly collect payments, set appointments, and analyze key metrics. Dive into a world where every tool you need resides under one umbrella, optimizing your operations and maximizing your business potential.
Screenshots
Verdict
The clearest difference is rating: One Source X at 5.0 against Calendar app *DeepBlack's 4.5. Calendar app *DeepBlack's advantage is iOS requirement (11.0 vs 16.6). On price, ratings volume, update cadence and ads 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.
One Source X holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
Calendar app *DeepBlack ships an update every 5 months, One Source X every 3 months. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.
| Parameter | Calendar app *DeepBlack | One Source X |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) | 5.0 (2 ratings) — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 10 MB | 312 MB |
| Age rating | 17+ | 4+ |
| Developer | Bakerstreet Co., Ltd. | One Source Branding & Media LLC |
Customer experience
Calendar app *DeepBlack
One Source X
In-app purchases
Calendar app *DeepBlack
No in-app purchases
One Source X
No in-app purchases
Questions
Is Calendar app *DeepBlack free?
Is One Source X free?
Which has better reviews, Calendar app *DeepBlack or One Source X?
Do Calendar app *DeepBlack or One Source X have ads?
Which is updated more often, Calendar app *DeepBlack or One Source X?
Other comparisons
