PopStar with Undo vs WatchG30
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PopStar with Undo
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.
- 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
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Highly addictive game. Once you start, you cannot stop. There are two modes. Game rule Classic: - Tap two or more blocks, which are same color - No time limit, once you meet target you can promote to next level Endless: - Tap two or more blocks, which are same color - Tap the blocks as more and fast as you can - The more block you tap once, the more time will be added - When level up the time drain will be faster - Once time up it will game over Score rule: Score = block x block x 5 Bonus rule of Classic mode: bonus = 2000 - block x block x 20 Features: - Undo Button - 9 different color blocks, you can choose random color or fixed color
WatchG30
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.
- Submarine control
- Depth charge interception
- 10 challenging levels
- Increasing difficulty
- Bonus phase progression
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Mission -------- You are on board a submarine, and your mission is to intercept the charges launched by the destroyer above you in the sea. You have 3 submarines. Complete the interceptions at different depth levels to proceed to the bonus phase. The game consists of 10 levels, each level faster than the previous one. To advance to the next level, you must intercept 10 depth charges. Controls --------- · Start button, begins the game. · M button, moves the submarine. · F button, fires the submarine. Good luck and have fun.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | PopStar with Undo | WatchG30 |
|---|---|---|
| Price | $4.00 | $1.99 — better |
| Rating | 4.7 (6 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 11 months — better | Every 40 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Oscar Tsang | Ivan Cerra de Castro |
Customer experience
PopStar with Undo
WatchG30
In-app purchases
PopStar with Undo
- Remove advertisement$1.99
WatchG30
No in-app purchases
