# Sampling Calculator Lite vs RLM

The clearest difference is review sentiment: RLM at 80% against Sampling Calculator Lite's 33%. RLM also leads on rating (4.1 vs 3.0) and update cadence (monthly vs every 14 months). Sampling Calculator Lite's advantage is in-app purchases (none vs 4) and iOS requirement (13.1 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. RLM sells 4 in-app purchases, starting at $0.49 per month. Sampling Calculator Lite asks for nothing beyond the download.

RLM holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: RLM has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of Sampling Calculator Lite's written reviews are positive against 80% of RLM's.

Sampling Calculator Lite ships an update every 14 months, RLM monthly. The most recent releases landed on August 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Sampling Calculator Lite | RLM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/sampling-calculator-lite/id1312060456/reviews) | **[4.1 (17 ratings)](https://appshunter.io/ios/app/rlm-15cx/id1636646608/reviews)** |
| Number of ratings | 3 | **17** |
| Positive reviews | 33.3% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 6 MB |
| Requires iOS | **13.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Juan Manuel Alfredo Sanchez](https://appshunter.io/developer/1304811061) | [R.L.M. Software](https://appshunter.io/developer/289639238) |

## What reviewers say

### Sampling Calculator Lite

[App page](https://appshunter.io/ios/app/sampling-calculator-lite/id1312060456)

This tool helps calculate sampling plans based on ANSI/ASQ Z1.4 2013 and MIL-STD-105E standards. It assists in determining sampling size codes and inspection levels for quality control processes.

**Highlights:** ANSI/ASQ Z1.4 2013 compliance, MIL-STD-105E compliance, Single sampling size calculation, Normal and Reduced inspection, AQL range from 0.065 to 15, Supports size code letters I, II, and III

**Features:** macOS Compatibility

**In-app purchases:** none


### RLM

[App page](https://appshunter.io/ios/app/rlm-15cx/id1636646608)

This advanced scientific calculator emulates the functionality of the HP-15C, offering comprehensive tools for finance, business, statistics, and scientific calculations. It supports programming, equation solving, and unit conversions, optimized for iOS devices.

**Highlights:** Programmable advanced scientific calculator, Finance and business calculation menus, Statistics and probability functions, Complex numbers and matrix operations, Unit and currency conversions, Equation solver and programming capabilities

**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 |
| One-Time Purchase | $9.99 | one-time |


## Frequently asked questions

### Is Sampling Calculator Lite free?

Sampling Calculator Lite is free to download, with no in-app purchases.

### Is RLM free?

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

### Which has better reviews, Sampling Calculator Lite or RLM?

RLM is rated higher. Sampling Calculator Lite averages 3.0 out of 5 from 3 ratings, while RLM averages 4.1 from 17 ratings.

### Do Sampling Calculator Lite or RLM have ads?

Neither Sampling Calculator Lite nor RLM shows ads.

### Which is updated more often, Sampling Calculator Lite or RLM?

Sampling Calculator Lite ships an update every 14 months, and RLM monthly. Most recently, Sampling Calculator Lite was updated on August 19, 2026 and RLM on September 10, 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.*