Booster OS vs Countdown Days
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Booster OS
Control your intelligent robot with this platform. Connect easily, view live feeds, and access a library of actions and agents. Customize robot behavior and receive automatic updates for new features.
- Bluetooth setup
- Real-time camera feeds
- Action library
- Multiple agents
- Customizable actions
- Automatic system updates
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Booster is an intelligent control platform designed for Booster robots. Easily connect and control your robot, view real-time camera feeds and status, access a vast library of built-in Actions and Agents, and customize robot Actions for a truly intelligent interactive experience. The Action library automatically syncs with official system updates, unlocking more surprises over time. Supported Models: Booster T1, Booster K1 Key Features: 1. Bluetooth Setup – Connect in One Tap 2. Multiple Agents – Endless Possibilities 3. Rich Action Library – Total Control 4. Simple Teaching – Edit Actions Easily 5. Official Updates – Unlock More
Countdown Days
An elegant countdown utility with a fluid glass design to track important moments. Features interactive widgets, push notification reminders, and seamless device syncing. Built natively for speed and a stunning user experience.
- Glassmorphic UI elements
- Interactive Lock Screen widgets
- Home Screen widgets
- Push notification reminders
- Cross-device syncing
- Native SwiftUI development
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CountdownDays is an elegant, fluid-glass countdown utility designed to help you track your most meaningful moments. Built 100% natively in SwiftUI for blazing-fast execution, it features stunning glassmorphic UI elements, interactive Lock Screen and Home Screen widgets in multiple sizes, and account-wide push notification reminders. Seamlessly authenticated via Jonapus SSO, your countdowns sync flawlessly across all your devices so you never miss a milestone.
Screenshots
Verdict
The clearest difference is rating: Countdown Days at 5.0 against Booster OS's 4.0. Countdown Days also leads on update cadence (every 3 days vs every 3 weeks). Booster OS's advantage is iOS requirement (15.6 vs 26.0). On price, ratings volume, 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.
Countdown Days holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Booster OS ships an update every 3 weeks, Countdown Days every 3 days. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.
| Parameter | Booster OS | Countdown Days |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 15.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 156 MB | 6 MB |
| Age rating | 17+ | 4+ |
| Developer | Booster Robotics Technology Co., Ltd | 卫中 张 |
Customer experience
Booster OS
Countdown Days
In-app purchases
Booster OS
No in-app purchases
Countdown Days
No in-app purchases
