# Idea Hack vs RPN

The clearest difference is review sentiment: RPN at 100% against Idea Hack's 50%. RPN also leads on rating (5.0 vs 3.0) and ratings volume (6 vs 1). Idea Hack's advantage is price (Free vs $1.99) and update cadence (every 5 days vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

Idea Hack is free to download; RPN costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: RPN has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Idea Hack's written reviews are positive against 100% of RPN's.

Idea Hack ships an update every 5 days, RPN every 2 months. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Idea Hack | RPN |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/idea-hack/id1080338969/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/rpn-38-cx/id1082636662/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 23 MB | 12 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAKAHIRO AYA](https://appshunter.io/developer/495555314) | [CuVee Software](https://appshunter.io/developer/424873503) |

## What reviewers say

### Idea Hack

[App page](https://appshunter.io/ios/app/idea-hack/id1080338969)

This app helps spark creativity by generating three random keywords to inspire new ideas. Users can register their own keywords and use the tool to brainstorm solutions or concepts, saving their thoughts in a memo field.

**Highlights:** Generate random keywords, Create custom keyword lists, Brainstorm ideas based on keywords, Save ideas to memo, Supports iPhone, iPad, iPod

**Features:** macOS Compatibility

**In-app purchases:** none


### RPN

[App page](https://appshunter.io/ios/app/rpn-38-cx/id1082636662)

This app is a photo-realistic simulation of a classic Hewlett-Packard programmable business calculator. It offers advanced programming features, extensive register memory, and a library of pre-installed programs for various financial and statistical calculations.

**Highlights:** Photo-realistic look-and-feel, Programmable with subroutines and flags, 20 registers with unlimited store/recall, Indirect register addressing, Program library and sharing, Financial and statistical functions, Date and calendar calculations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Idea Hack free?

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

### Is RPN free?

RPN costs $1.99, with no in-app purchases.

### Which has better reviews, Idea Hack or RPN?

RPN is rated higher. Idea Hack averages 3.0 out of 5 from 1 ratings, while RPN averages 5.0 from 6 ratings.

### Do Idea Hack or RPN have ads?

Neither Idea Hack nor RPN shows ads.

### Which is updated more often, Idea Hack or RPN?

Idea Hack ships an update every 5 days, and RPN every 2 months. Most recently, Idea Hack was updated on October 17, 2026 and RPN on October 12, 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.*