# GP Bubble vs Deadline Countdown Tracker

The clearest difference is in-app purchases: GP Bubble at none against Deadline Countdown Tracker's 3. Deadline Countdown Tracker's advantage is update cadence (every 6 weeks vs every 8 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Deadline Countdown Tracker sells 3 in-app purchases, starting at $4.99 per 7 days. GP Bubble asks for nothing beyond the download.

GP Bubble ships an update every 8 months, Deadline Countdown Tracker every 6 weeks. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | GP Bubble | Deadline Countdown Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 weeks** |
| Size | 3 MB | 7 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gengpu Liu](https://appshunter.io/developer/1877091291) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### GP Bubble

[App page](https://appshunter.io/ios/app/gp-bubble/id6759848712)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Deadline Countdown Tracker

[App page](https://appshunter.io/ios/app/deadline-countdown-tracker/id6772181437)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Study Planner – Weekly | $4.99 | per 7 days |
| Project Agenda – Yearly | $24.99 | per year |
| Focus Sessions - One-Time | $49.99 | one-time |


## Frequently asked questions

### Is GP Bubble free?

GP Bubble is free to download, with no in-app purchases.

### Is Deadline Countdown Tracker free?

Deadline Countdown Tracker is free to download, with in-app purchases available.

### Do GP Bubble or Deadline Countdown Tracker have ads?

Neither GP Bubble nor Deadline Countdown Tracker shows ads.

### Which is updated more often, GP Bubble or Deadline Countdown Tracker?

GP Bubble ships an update every 8 months, and Deadline Countdown Tracker every 6 weeks. Most recently, GP Bubble was updated on October 28, 2026 and Deadline Countdown Tracker on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*