# Spectral Shift vs Stack 101 Tower

The clearest difference is ads: Spectral Shift at none against Stack 101 Tower's shown. On price, update cadence, 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.

Spectral Shift ships an update every 3 days, Stack 101 Tower every 5 days. The most recent releases landed on May 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Spectral Shift | Stack 101 Tower |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 63 MB | 54 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MICHAL TVRDY](https://appshunter.io/developer/1675124258) | [ZHENG YU-XIANG](https://appshunter.io/developer/1863257025) |

## What reviewers say

### Spectral Shift

[App page](https://appshunter.io/ios/app/spectral-shift/id6757589931)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack 101 Tower

[App page](https://appshunter.io/ios/app/stack-101-tower/id6759484448)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spectral Shift free?

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

### Is Stack 101 Tower free?

Stack 101 Tower is free to download, with no in-app purchases.

### Do Spectral Shift or Stack 101 Tower have ads?

Stack 101 Tower shows ads; Spectral Shift does not.

### Which is updated more often, Spectral Shift or Stack 101 Tower?

Spectral Shift ships an update every 3 days, and Stack 101 Tower every 5 days. Most recently, Spectral Shift was updated on May 19, 2026 and Stack 101 Tower on September 14, 2026.

---

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