# LSSI vs SIGMASMITH

The clearest difference is monetization model: SIGMASMITH at free against LSSI's free with in-app purchases. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. LSSI sells 8 in-app purchases, starting at $9.99 per month and SIGMASMITH sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for LSSI against 5.0 for SIGMASMITH. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

LSSI ships an update fortnightly, SIGMASMITH every 3 weeks. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | LSSI | SIGMASMITH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/lssi/id1615149540/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/sigmasmith/id6475358569/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 64 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lean Six Sigma Institute](https://appshunter.io/developer/1608279942) | [Richard Valois](https://appshunter.io/developer/1724050357) |

## What reviewers say

### LSSI

[App page](https://appshunter.io/ios/app/lssi/id1615149540)

Connect with professionals globally, join groups, and participate in Master Classes. Access practical tools, guidelines, and courses, and discover job opportunities. Share your business case studies and enhance your professional development.

**Highlights:** Global professional networking, Join and create discussion groups, Participate in Master Classes, Access practical tools and guidelines, Read and share business case studies, Job opportunity search

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LSSI Pro Membership | $9.99 | per month |
| LSSI Premium Membership | $99.99 | per month |
| Lean Management Certification | $199.99 | one-time |
| LSS White Belt Certification | $199.99 | one-time |
| LSS Yellow Belt Certification | $499.99 | one-time |
| LSS Green Belt Certification | $699.99 | one-time |
| LSS Black Belt Certification | $799.99 | one-time |
| LSS Green Belt Certification | $799.99 | one-time |


### 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 |


## Frequently asked questions

### Is LSSI free?

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

### Is SIGMASMITH free?

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

### Which has better reviews, LSSI or SIGMASMITH?

LSSI and SIGMASMITH are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do LSSI or SIGMASMITH have ads?

Neither LSSI nor SIGMASMITH shows ads.

### Which is updated more often, LSSI or SIGMASMITH?

LSSI ships an update fortnightly, and SIGMASMITH every 3 weeks. Most recently, LSSI was updated on October 5, 2026 and SIGMASMITH on October 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.*