# Screw Shift Logic vs Zippy Sum

The clearest difference is update cadence: Zippy Sum at weekly against Screw Shift Logic's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Screw Shift Logic ships an update monthly, Zippy Sum weekly. The most recent releases landed on October 28, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Screw Shift Logic | Zippy Sum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (225 ratings)](https://appshunter.io/ios/app/screw-shift-logic/id6761550586/reviews)** | — |
| Number of ratings | **225** | — |
| Positive reviews | 18.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 260 MB | 27 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Harshita Singhal](https://appshunter.io/developer/1873964486) | [Pushkar Kathuria](https://appshunter.io/developer/1896538275) |

## What reviewers say

### Screw Shift Logic

[App page](https://appshunter.io/ios/app/screw-shift-logic/id6761550586)

Test your speed and logic in this puzzle game where you must match colored screws by tapping buttons to generate them. Plan your sequence carefully to ensure perfect color and order matches as the conveyor belt moves your platform upwards. Master increasingly complex challenges and new mechanics to succeed.

**Highlights:** Conveyor-based puzzle mechanics, Match colored screws, Tap to generate screws, Gradually increasing difficulty, Addictive logic gameplay, Intuitive controls

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

**In-app purchases:** none


### Zippy Sum

[App page](https://appshunter.io/ios/app/zippy-sum/id6768092391)

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

**In-app purchases:** none


## Frequently asked questions

### Is Screw Shift Logic free?

Screw Shift Logic is free to download, with no in-app purchases.

### Is Zippy Sum free?

Zippy Sum is free to download, with no in-app purchases.

### Do Screw Shift Logic or Zippy Sum have ads?

Both Screw Shift Logic and Zippy Sum show ads.

### Which is updated more often, Screw Shift Logic or Zippy Sum?

Screw Shift Logic ships an update monthly, and Zippy Sum weekly. Most recently, Screw Shift Logic was updated on October 28, 2026 and Zippy Sum on October 23, 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.*