# Halcyon Calc Lite vs RLM

The clearest difference is rating: Halcyon Calc Lite at 4.6 against RLM's 3.1. Halcyon Calc Lite also leads on review sentiment (67% vs 40%). RLM's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 3 months). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Halcyon Calc Lite sells 3 one-off in-app purchases and RLM sells 4 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

Halcyon Calc Lite holds the better App Store score, 4.6 against 3.1. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews point the same way: 67% of Halcyon Calc Lite's written reviews are positive against 40% of RLM's.

Halcyon Calc Lite ships an update every 3 months, RLM every 5 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Halcyon Calc Lite | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (15 ratings)](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888/reviews)** | [3.1 (7 ratings)](https://appshunter.io/ios/app/rlm-11cx/id1630739014/reviews) |
| Number of ratings | **15** | 7 |
| Positive reviews | **66.7% of reviews** | 40.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 13 MB | 6 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Halcyon Touch Software](https://appshunter.io/developer/327064662) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### Halcyon Calc Lite

[App page](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888)

This app is a powerful calculator for students and professionals, offering advanced features like symbolic expression manipulation, graphing, and statistical analysis. It supports real, complex, and integer numbers, matrices, and vectors, making it versatile for various mathematical tasks.

**Highlights:** Symbolic expression manipulation, Graphing of expressions, Matrix and vector calculations, Statistical analysis, Multiple number formats (decimal, hex, octal, binary), Over 225 built-in operations

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Directory And Unit Conversion Support | $0.99 | one-time |
| Programming Support | $1.99 | one-time |
| Larger Display Upgrade | $1.99 | one-time |


### RLM

[App page](https://appshunter.io/ios/app/rlm-11cx/id1630739014)

This app is a scientific and programmable calculator designed for science and engineering, replicating the functionality of the HP-11C. It offers extensive features for finance, business, statistics, complex numbers, and unit conversions, with a programmable interface for custom calculations.

**Highlights:** Finance calculations (amortization, bond price, Black-Scholes), Business functions (break-even, currency exchange), Statistical analysis (regression, probability distributions), Scientific functions (complex numbers, logarithms, trigonometry), Unit and currency conversions, Programmable interface for custom scripts, Equation solver

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.49 | per month |
| Semi-Annual Subscription | $2.99 | per 6 months |
| Annual Subscription | $5.99 | per year |
| Lifetime Purchase | $9.99 | one-time |


## Frequently asked questions

### Is Halcyon Calc Lite free?

Halcyon Calc Lite is free to download, with in-app purchases available.

### Is RLM free?

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

### Which has better reviews, Halcyon Calc Lite or RLM?

Halcyon Calc Lite is rated higher. Halcyon Calc Lite averages 4.6 out of 5 from 15 ratings, while RLM averages 3.1 from 7 ratings.

### Do Halcyon Calc Lite or RLM have ads?

Halcyon Calc Lite shows ads; RLM does not.

### Which is updated more often, Halcyon Calc Lite or RLM?

Halcyon Calc Lite ships an update every 3 months, and RLM every 5 weeks. Most recently, Halcyon Calc Lite was updated on October 29, 2026 and RLM on October 30, 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.*