# RCL vs HP

The clearest difference is update cadence: HP at every 11 days against RCL's every 14 months. RCL's advantage is iOS requirement (15.1 vs 17.2). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RCL ships an update every 14 months, HP every 11 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | RCL | HP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (64 ratings)](https://appshunter.io/ios/app/hp-35/id6738010641/reviews)** |
| Number of ratings | — | **64** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 11 days** |
| Monetization | Free | Free |
| Size | 2 MB | 2 MB |
| Requires iOS | **15.1** | 17.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Paul Novaes](https://appshunter.io/developer/597527233) | [Enrique Haro](https://appshunter.io/developer/1778874870) |

## What reviewers say

### RCL

[App page](https://appshunter.io/ios/app/rcl-57/id1621959742)

This app faithfully recreates the TI-57 programmable calculator, offering its full scientific functions and programming capabilities. It includes a user manual, sample programs, and features like turbo speed and alphanumeric display.

**Highlights:** TI-57 recreation, Scientific functions, Programming capabilities, User manual included, Sample programs, Turbo speed option, Alphanumeric display option

**Features:** macOS Compatibility

**In-app purchases:** none


### HP

[App page](https://appshunter.io/ios/app/hp-35/id6738010641)

Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.

**Highlights:** RPN calculator emulation, HP-35 model, HP-45 model, HP-21 model, Classic scientific calculator interface

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

**In-app purchases:** none


## Frequently asked questions

### Is RCL free?

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

### Is HP free?

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

### Do RCL or HP have ads?

Neither RCL nor HP shows ads.

### Which is updated more often, RCL or HP?

RCL ships an update every 14 months, and HP every 11 days. Most recently, RCL was updated on November 3, 2026 and HP on November 4, 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.*