Arbitrium vs Simplex by SMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arbitrium
This app assists in making rational decisions by allowing you to define criteria and rate your options. It uses a weighted decision matrix to help you identify the best choice for various life scenarios.
- Define decision criteria
- Rate available options
- Weighted decision matrix
- Identify best choice
- Save and manage decisions
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We often have to take decisions. Arbitrium is an app that will help you take the right one in a simple and rational way. Establish the criteria you need to consider and then rate each option you have available. The option with the highest score will be the best one. Arbitrium is based on the weighted decision matrix concept and will help you take decisions such as: Which car should I buy? Which bank should I choose for a mortgage? Where should I go on vacation? Which job offer should I accept? Which nursery should I choose for my child?
Simplex by SMS
This all-in-one platform uses AI to streamline sales and marketing for gym owners. It offers lead generation, automated workflows, reputation management, and a website builder. Seamlessly syncs automated marketing with personal team interaction for a personalized customer experience.
- AI-powered sales and marketing
- Lead generation from multiple sources
- Automated workflows
- Reputation management tool
- Website builder
- CRM/lead management
- 2-way sync with automation
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Calling all gym owners! Are you tired of juggling multiple systems to manage your sales and marketing efforts? Simplex Marketing System is here to revolutionize your gym's marketing game! Our all-in-one platform, powered by advanced AI technology, is designed to help you streamline your sales and marketing processes, increase efficiency, and drive more revenue. Our platform includes features such as lead generation from multiple sources, automated workflows, and a reputation management tool, all designed to build your gym's online presence and grow your customer base. Our website builder and CRM/lead management system allow you to manage all aspects of your gym's marketing and sales in one easy-to-use platform. But what sets Simplex Marketing System apart is our unique 2-way sync with automation. Our platform seamlessly integrates the experience delivered by automated marketing communications with the personal touch delivered by your team. Humans and robots can work together to provide your gym's customers with a personalized experience that drives results. Don't wait any longer to take your gym's marketing efforts to the next level. Join the thousands of businesses who have already discovered the power of Simplex Marketing System and experience the benefits of seamless automation and human interaction today!
Screenshots
Verdict
The clearest difference is in-app purchases: Simplex by SMS at none against Arbitrium's 1. Simplex by SMS also leads on update cadence (every 3 months vs every 28 months). Arbitrium's advantage is ratings volume (11 vs 1). On price, rating, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Arbitrium sells 1 one-off in-app purchase. Simplex by SMS asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Arbitrium against 5.0 for Simplex by SMS. That said, the two scores are not equally well evidenced: Arbitrium has 11 ratings behind it against 1, so its average is the more settled of the two.
Arbitrium ships an update every 28 months, Simplex by SMS every 3 months. The most recent releases landed on September 28, 2026 and September 22, 2026 respectively.
| Parameter | Arbitrium | Simplex by SMS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (11 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 11 — better | 1 |
| Update frequency | Every 28 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 8 MB | 347 MB |
| Age rating | 4+ | 17+ |
| Developer | The Lost Project | Simplex Marketing System |
Customer experience
Arbitrium
Simplex by SMS
In-app purchases
Arbitrium
- PRO Mode$0.99
Simplex by SMS
No in-app purchases









