# Screw Blast vs Zero Sum

The clearest difference is review sentiment: Zero Sum at 100% against Screw Blast's 19%. Zero Sum also leads on update cadence (every 3 days vs every 2 weeks). Screw Blast's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Screw Blast sells 14 one-off in-app purchases and Zero Sum sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Screw Blast ships an update every 2 weeks, Zero Sum every 3 days. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Screw Blast | Zero Sum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (6.6K ratings)](https://appshunter.io/ios/app/screw-blast-pin-jam-puzzle/id6737591996/reviews)** | — |
| Number of ratings | **6.6K** | — |
| Positive reviews | 19.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 521 MB | 23 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [PicoPoch Co., Ltd.](https://appshunter.io/developer/1647525401) | [Mathew DeLong](https://appshunter.io/developer/455985926) |

## What reviewers say

### Screw Blast

[App page](https://appshunter.io/ios/app/screw-blast-pin-jam-puzzle/id6737591996)

Engage your mind and reflexes by sorting colorful screws into their matching boxes. Earn rewards to unlock a variety of decorations and personalize your pet's room, creating a cozy and welcoming home.

**Highlights:** Colorful 3D screw sorting, Unlockable room decorations, Intuitive interface for all ages, Observation and reaction speed challenges, Achievement system and leaderboard, Special surprise levels

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Icebreaker Bundle | $0.99 | one-time |
| Coins Bundle 1 | $1.99 | one-time |
| Bounty Road 1 | $1.99 | one-time |
| Piggy bank 1 | $1.99 | one-time |
| Permanent Bundle 1 | $3.99 | one-time |
| Coins Bundle 2 | $5.99 | one-time |
| Battle Pass | $6.99 | one-time |
| Permanent Bundle 2 | $9.99 | one-time |
| REMOVE ADS | $9.99 | one-time |
| Coins Bundle 3 | $14.99 | one-time |
| Permanent Bundle 3 | $19.99 | one-time |
| Coins Bundle 4 | $29.99 | one-time |
| Coins Bundle 5 | $54.99 | one-time |
| Coins Bundle 6 | $99.99 | one-time |

**What reviewers like**

- 👍 Fun and challenging
- 👍 Great 3D screw game
- 👍 Relaxing and enjoyable

**What reviewers complain about**

- 🐛 Ads failing to load
- 🔒 Rigged to force ads
- 🔒 Ads required to progress
- 🐛 Glitches and crashes

**Reported bugs**

- Ads failing to load
- Freezing on ads
- Progress loss after crashes

**Requested features**

- Dark mode option
- More customization options


### Zero Sum

[App page](https://appshunter.io/ios/app/zero-sum/id6779928476)

A puzzle game where players merge numbered tiles to clear the board and reach zero. Strategic merging of positive, negative, and multiplier tiles presents increasingly difficult challenges.

**Highlights:** Merge numbered tiles, Clear the board, Reach zero score, Interact with positive, negative, and multiplier tiles, Solve challenging boards, Unlockable cases

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Screw Blast free?

Screw Blast is free to download, with in-app purchases available.

### Is Zero Sum free?

Zero Sum is free to download, with in-app purchases available.

### Do Screw Blast or Zero Sum have ads?

Both Screw Blast and Zero Sum show ads.

### Which is updated more often, Screw Blast or Zero Sum?

Screw Blast ships an update every 2 weeks, and Zero Sum every 3 days. Most recently, Screw Blast was updated on October 25, 2026 and Zero Sum on October 9, 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.*