# O vs MrConveyor LT

The clearest difference is price: O at Free against MrConveyor LT's $49.99. O also leads on ratings volume (5 vs 1). MrConveyor LT's advantage is rating (5.0 vs 3.8). On update cadence, ads, in-app purchases and device support there is nothing between them.

O is free to download; MrConveyor LT costs $49.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MrConveyor LT holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: O has 5 ratings behind it against 1, so its average is the more settled of the two.

O ships an update every 3 months, MrConveyor LT every 4 months. Both last shipped on October 12, 2026.

## The numbers

| Metric | O | MrConveyor LT |
| --- | --- | --- |
| Price | **Free** | $49.99 |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/o-ring/id485346224/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mrconveyor-lt/id1534771511/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 26 MB | 1 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [Gerhard Schmidt](https://appshunter.io/developer/1528796386) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-ring/id485346224)

This app helps users calculate O-Ring dimensions and find compatible materials for their applications. It provides recommendations based on ISO standards and supports both metric and inch measurements.

**Highlights:** O-Ring housing calculation, O-Ring size recommendations by ISO standard, Quick search by national/international standards, O-Ring tolerance calculation, Metric and inch unit switching, Chemical compatibility check, Integration of Trelleborg Sealing Solutions Videos

**Features:** macOS Compatibility

**In-app purchases:** none


### MrConveyor LT

[App page](https://appshunter.io/ios/app/mrconveyor-lt/id1534771511)

This tool provides basic conveyor calculations and drive power estimations. It supports both metric and US units, following DIN/ISO and CEMA standards for cross-section and simplified drive calculations. It's ideal for initial, on-the-road estimates.

**Highlights:** Conveyor cross-section calculation, Drive power estimation, DIN/ISO and CEMA standards support, Metric and US units, Simplified drive calculation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is MrConveyor LT free?

MrConveyor LT costs $49.99, with no in-app purchases.

### Which has better reviews, O or MrConveyor LT?

MrConveyor LT is rated higher. O averages 3.8 out of 5 from 5 ratings, while MrConveyor LT averages 5.0 from 1 ratings.

### Do O or MrConveyor LT have ads?

Neither O nor MrConveyor LT shows ads.

### Which is updated more often, O or MrConveyor LT?

O ships an update every 3 months, and MrConveyor LT every 4 months. Most recently, O was updated on October 12, 2026 and MrConveyor LT on October 12, 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.*