# TASS Pump Selector vs Prompt Engineering Library

The clearest difference is price: TASS Pump Selector at Free against Prompt Engineering Library's $0.99. TASS Pump Selector also leads on iOS requirement (10.1 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

TASS Pump Selector is free to download; Prompt Engineering Library costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | TASS Pump Selector | Prompt Engineering Library |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 45 MB | 30 MB |
| Requires iOS | **10.1** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tsurumi Manufacturing Co.,Ltd.](https://appshunter.io/developer/1168837750) | [Ruud Telman](https://appshunter.io/developer/1843436085) |

## What reviewers say

### TASS Pump Selector

[App page](https://appshunter.io/ios/app/tass-pump-selector/id1516732550)

**Features:** macOS Compatibility

**In-app purchases:** none


### Prompt Engineering Library

[App page](https://appshunter.io/ios/app/prompt-engineering-library/id6753958156)

**In-app purchases:** none


## Frequently asked questions

### Is TASS Pump Selector free?

TASS Pump Selector is free to download, with no in-app purchases.

### Is Prompt Engineering Library free?

Prompt Engineering Library costs $0.99, with no in-app purchases.

### Do TASS Pump Selector or Prompt Engineering Library have ads?

Neither TASS Pump Selector nor Prompt Engineering Library shows ads.

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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.*