# SIGMASMITH vs OEE Calculator

The clearest difference is in-app purchases: OEE Calculator at none against SIGMASMITH's 3. SIGMASMITH's advantage is iOS requirement (15.6 vs 26.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. SIGMASMITH sells 3 one-off in-app purchases. OEE Calculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SIGMASMITH against 5.0 for OEE Calculator. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SIGMASMITH | OEE Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/sigmasmith/id6475358569/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/oee-calculator/id6758173809/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 64 MB | 183 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Richard Valois](https://appshunter.io/developer/1724050357) | [Sigma Venturi LLC](https://appshunter.io/developer/1834730794) |

## What reviewers say

### SIGMASMITH

[App page](https://appshunter.io/ios/app/sigmasmith/id6475358569)

This toolkit helps businesses optimize operations by calculating labor costs, tracking error frequency with Pareto charts, and conducting time studies with line balance charts. It provides data-driven insights to enhance productivity and manage resources effectively.

**Highlights:** Efficiency Calculator for labor hours and cost per unit, Error Frequency Tracker with Pareto charts, Time Study tool with line balance charts, Takt Time alignment for demand matching, Data-driven decision making for operations

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Premium For Life | $0.99 | one-time |
| Get Professional For Month | $4.99 | one-time |
| Get Yearly Subscription | $44.99 | one-time |


### OEE Calculator

[App page](https://appshunter.io/ios/app/oee-calculator/id6758173809)

This app helps measure and understand Overall Equipment Effectiveness (OEE) in manufacturing. By tracking key metrics like quality, performance, and availability, it provides insights to systematically improve production processes.

**Highlights:** Measures Overall Equipment Effectiveness (OEE), Tracks quality, performance, and availability, Identifies underlying production losses, Provides insights for process improvement, Supports manufacturing best practices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SIGMASMITH free?

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

### Is OEE Calculator free?

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

### Which has better reviews, SIGMASMITH or OEE Calculator?

SIGMASMITH and OEE Calculator are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do SIGMASMITH or OEE Calculator have ads?

Neither SIGMASMITH nor OEE Calculator shows ads.

### Which is updated more often, SIGMASMITH or OEE Calculator?

SIGMASMITH ships an update every 3 weeks, and OEE Calculator every 3 weeks. Most recently, SIGMASMITH was updated on November 4, 2026 and OEE Calculator on October 31, 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.*