# PopStar with Undo vs WatchG30

The clearest difference is review sentiment: WatchG30 at 100% against PopStar with Undo's 33%. WatchG30 also leads on in-app purchases (none vs 1) and ads (none vs shown). PopStar with Undo's advantage is rating (4.7 vs 4.0) and update cadence (every 11 months vs every 40 months). On monetization model and iOS requirement there is nothing between them.

PopStar with Undo costs $4.00 and WatchG30 $1.99 up front. PopStar with Undo sells 1 one-off in-app purchase. WatchG30 asks for nothing beyond the download.

PopStar with Undo holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: PopStar with Undo has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 33% of PopStar with Undo's written reviews are positive against 100% of WatchG30's, so the app with the better star average is not the one people write more warmly about.

PopStar with Undo ships an update every 11 months, WatchG30 every 40 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | PopStar with Undo | WatchG30 |
| --- | --- | --- |
| Price | $4.00 | **$1.99** |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/popstar-with-undo/id598512361/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/watchg30/id6448919640/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 11 months** | Every 40 months |
| Monetization | Paid | Paid |
| Size | 22 MB | 7 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Oscar Tsang](https://appshunter.io/developer/416987065) | [Ivan Cerra de Castro](https://appshunter.io/developer/321270638) |

## What reviewers say

### PopStar with Undo

[App page](https://appshunter.io/ios/app/popstar-with-undo/id598512361)

This highly addictive puzzle game offers two distinct modes: Classic, where you clear blocks to meet level targets without a time limit, and Endless, which challenges you to clear as many blocks as possible against the clock. Features include an undo button and customizable block colors.

**Highlights:** Two game modes: Classic and Endless, Tap two or more same-colored blocks, No time limit in Classic mode, Time-based challenges in Endless mode, Undo button, Customizable block colors

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove advertisement | $1.99 | one-time |


### WatchG30

[App page](https://appshunter.io/ios/app/watchg30/id6448919640)

Pilot a submarine to intercept incoming depth charges launched from a destroyer. Navigate through 10 increasingly challenging levels, each requiring you to intercept 10 charges to advance. Master the controls to fire and move your submarine effectively.

**Highlights:** Submarine control, Depth charge interception, 10 challenging levels, Increasing difficulty, Bonus phase progression

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PopStar with Undo free?

PopStar with Undo costs $4.00, and also offers in-app purchases.

### Is WatchG30 free?

WatchG30 costs $1.99, with no in-app purchases.

### Which has better reviews, PopStar with Undo or WatchG30?

PopStar with Undo is rated higher. PopStar with Undo averages 4.7 out of 5 from 6 ratings, while WatchG30 averages 4.0 from 1 ratings.

### Do PopStar with Undo or WatchG30 have ads?

PopStar with Undo shows ads; WatchG30 does not.

### Which is updated more often, PopStar with Undo or WatchG30?

PopStar with Undo ships an update every 11 months, and WatchG30 every 40 months. Most recently, PopStar with Undo was updated on October 24, 2026 and WatchG30 on October 22, 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.*