# Concept Keywords vs QI Calculator

The clearest difference is update cadence: QI Calculator at every 3 weeks against Concept Keywords's every 2 months. Concept Keywords's advantage is iOS requirement (8.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Concept Keywords sells 4 one-off in-app purchases and QI Calculator sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Concept Keywords ships an update every 2 months, QI Calculator every 3 weeks. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Concept Keywords | QI Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (12 ratings)](https://appshunter.io/ios/app/concept-keywords/id933071030/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 129 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Fiision Studio Company Limited](https://appshunter.io/developer/674479868) | [shouhui qi](https://appshunter.io/developer/1185710456) |

## What reviewers say

### Concept Keywords

[App page](https://appshunter.io/ios/app/concept-keywords/id933071030)

This app provides random creative prompts to inspire sketching, illustration, and design projects. It's a tool for generating unique ideas to fuel your artistic endeavors.

**Highlights:** Random idea generation, Sketching inspiration, Illustration prompts, Design ideas, Creative tool

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donate $1.00 | $0.99 | one-time |
| Donate $3.00 | $2.99 | one-time |
| Donate $5.00 | $4.99 | one-time |
| Donate $10.00 | $9.99 | one-time |


### QI Calculator

[App page](https://appshunter.io/ios/app/qi-calculator/id6476379861)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theme | $0.99 | one-time |
| Theme Blue Sky | $0.99 | one-time |


## Frequently asked questions

### Is Concept Keywords free?

Concept Keywords is free to download, with in-app purchases available.

### Is QI Calculator free?

QI Calculator is free to download, with in-app purchases available.

### Do Concept Keywords or QI Calculator have ads?

Neither Concept Keywords nor QI Calculator shows ads.

### Which is updated more often, Concept Keywords or QI Calculator?

Concept Keywords ships an update every 2 months, and QI Calculator every 3 weeks. Most recently, Concept Keywords was updated on November 6, 2026 and QI Calculator on November 8, 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.*