# ZX81 vs Progressbar Popup Fighter

The clearest difference is in-app purchases: ZX81 at none against Progressbar Popup Fighter's 10. ZX81 also leads on ads (none vs shown) and update cadence (every 10 days vs every 2 months). Progressbar Popup Fighter's advantage is iOS requirement (9.0 vs 15.0). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Progressbar Popup Fighter sells 10 in-app purchases, starting at $1.99 per month. ZX81 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for ZX81 against 4.8 for Progressbar Popup Fighter. Both are backed by a comparable volume of ratings — 92 and 98 respectively. Written reviews are what separate them: 98% of ZX81's written reviews are positive against 90% of Progressbar Popup Fighter's.

ZX81 ships an update every 10 days, Progressbar Popup Fighter every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ZX81 | Progressbar Popup Fighter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (92 ratings)](https://appshunter.io/ios/app/zx81/id1180117434/reviews)** | [4.8 (98 ratings)](https://appshunter.io/ios/app/progressbar-popup-fighter/id1545182393/reviews) |
| Number of ratings | 92 | **98** |
| Positive reviews | **98.4% of reviews** | 89.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 86 MB | 265 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Kevin Palser](https://appshunter.io/developer/1180117433) | [SH Limited](https://appshunter.io/developer/960275282) |

## What reviewers say

### ZX81

[App page](https://appshunter.io/ios/app/zx81/id1180117434)

Experience early 1980s home computing with this app dedicated to the Sinclair ZX80 and ZX81. It includes a wealth of example software, offering a nostalgic journey into the origins of personal computing.

**Highlights:** Sinclair ZX80/ZX81 emulation, Timex Sinclair 1000 support, Includes example software, Focuses on early 1980s computing, ROM code included with permission

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

**In-app purchases:** none


### Progressbar Popup Fighter

[App page](https://appshunter.io/ios/app/progressbar-popup-fighter/id1545182393)

A retro-themed game where players must quickly close pop-up windows to prevent a system crash. Test your reaction time and attention as you battle tricky notifications designed to overwhelm your virtual computer.

**Highlights:** Retro interface and sounds, Tricky pop-up challenges, Test reaction and attention, Endless gameplay potential, Prevent system crashes

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Premium user 50% OFF | $1.99 | per month |
| 3 Months Premium user 50% OFF | $5.99 | per 3 months |
| 1 Year Premium user 50% OFF | $17.49 | per year |
| 80 Gems 50% OFF | $1.99 | one-time |
| Remove ads 50% OFF | $2.49 | one-time |
| 5 000 Coins 50% OFF | $2.99 | one-time |
| Remove Ads | $4.99 | one-time |
| 25 000 Coins 50% OFF | $9.99 | one-time |
| Unlock All 50% OFF | $11.99 | one-time |
| Unlock ALL | $23.99 | one-time |


## Frequently asked questions

### Is ZX81 free?

ZX81 is free to download, with no in-app purchases.

### Is Progressbar Popup Fighter free?

Progressbar Popup Fighter is free to download, with in-app purchases available.

### Which has better reviews, ZX81 or Progressbar Popup Fighter?

ZX81 is rated higher. ZX81 averages 4.9 out of 5 from 92 ratings, while Progressbar Popup Fighter averages 4.8 from 98 ratings.

### Do ZX81 or Progressbar Popup Fighter have ads?

Progressbar Popup Fighter shows ads; ZX81 does not.

### Which is updated more often, ZX81 or Progressbar Popup Fighter?

ZX81 ships an update every 10 days, and Progressbar Popup Fighter every 2 months. Most recently, ZX81 was updated on November 2, 2026 and Progressbar Popup Fighter on November 3, 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.*