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 3.0. 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 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Booster OS ships an update every 3 weeks, Countdown Days every 3 days. The most recent releases landed on August 20, 2026 and September 10, 2026 respectively.
| Parameter | Booster OS | Countdown Days |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 1 | 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 | 137 MB | 5 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
Questions
Is Booster OS free?
Is Countdown Days free?
Which has better reviews, Booster OS or Countdown Days?
Do Booster OS or Countdown Days have ads?
Which is updated more often, Booster OS or Countdown Days?
Other comparisons
