# RPN vs 1secNote

The clearest difference is update cadence: 1secNote at every 4 weeks against RPN's every 2 months. 1secNote also leads on device support (5 vs 2). RPN's advantage is price ($1.99 vs $2.99) and iOS requirement (12.0 vs 15.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

RPN costs $1.99 and 1secNote $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 2 months, 1secNote every 4 weeks. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RPN | 1secNote |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/rpn-38-cx/id1082636662/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Paid | Paid |
| Size | 12 MB | 34 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [editoy Inc.](https://appshunter.io/developer/1191725361) |

## What reviewers say

### 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


### 1secNote

[App page](https://appshunter.io/ios/app/1secnote-floating-prompter/id6476831073)

This app allows you to view notes discreetly while using your device's camera or other applications. It offers AI-powered suggestions and syncs across all your Apple devices, with a unique retro aesthetic option.

**Highlights:** Floating note display, AI line suggestions, Cross-device synchronization, Notch and status bar integration, Retro aesthetic mode

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is 1secNote free?

1secNote costs $2.99, with no in-app purchases.

### Do RPN or 1secNote have ads?

Neither RPN nor 1secNote shows ads.

### Which is updated more often, RPN or 1secNote?

RPN ships an update every 2 months, and 1secNote every 4 weeks. Most recently, RPN was updated on October 20, 2026 and 1secNote on October 7, 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.*