# Messiah Elementary vs RPN Memory Calculator

The clearest difference is in-app purchases: Messiah Elementary at none against RPN Memory Calculator's 1. RPN Memory Calculator's advantage is iOS requirement (11.3 vs 15.0). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. RPN Memory Calculator sells 1 one-off in-app purchase. Messiah Elementary asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Messiah Elementary | RPN Memory Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/messiah-elementary/id1389910283/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | Free |
| Size | 56 MB | 8 MB |
| Requires iOS | 15.0 | **11.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Messiah Lutheran Church & School Inc.](https://appshunter.io/developer/1389910281) | [Neverest Limited](https://appshunter.io/developer/1360645388) |

## What reviewers say

### Messiah Elementary

[App page](https://appshunter.io/ios/app/messiah-elementary/id1389910283)

This app serves as a central communication tool for Messiah Lutheran School, providing access to calendars, newsletters, and important event notifications. It aims to foster community engagement and facilitate sharing school information.

**Highlights:** School calendars, Newsletter access, Event notifications, Community engagement tools, Information sharing

**Features:** Vision Pro support

**In-app purchases:** none


### RPN Memory Calculator

[App page](https://appshunter.io/ios/app/rpn-memory-calculator/id1398878075)

This application provides a straightforward reverse Polish notation (RPN) calculator with essential functions and memory operations. It also includes integrated unit conversions for various measurements, allowing for quick conversions directly within the app. The calculator remembers your session, preserving all registers and memory values for future use.

**Highlights:** Reverse Polish Notation (RPN) input, Seven core calculator functions, Memory operations, Integrated unit conversions (Speed, Mass, Temperature, Pressure), Persistent state saving, Three visible registers

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator Unit Conversions | $0.99 | one-time |


## Frequently asked questions

### Is Messiah Elementary free?

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

### Is RPN Memory Calculator free?

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

### Do Messiah Elementary or RPN Memory Calculator have ads?

Neither Messiah Elementary nor RPN Memory Calculator shows ads.

### Which is updated more often, Messiah Elementary or RPN Memory Calculator?

Messiah Elementary ships an update every 4 months, and RPN Memory Calculator every 4 months. Most recently, Messiah Elementary was updated on October 7, 2026 and RPN Memory Calculator on October 24, 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.*