# OneView Decision Support Sys vs Big Decision

The clearest difference is update cadence: OneView Decision Support Sys at monthly against Big Decision's every 6 months. OneView Decision Support Sys also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OneView Decision Support Sys ships an update monthly, Big Decision every 6 months. The most recent releases landed on October 6, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | OneView Decision Support Sys | Big Decision |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/big-decision-decide-now/id6469323941/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | — | Free |
| Size | 24 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SERVILUB SERVICOS DE LUBRIFICACAO E ELETROMECANICA LTDA](https://appshunter.io/developer/1609255929) | [Sergei Andrei Postnov, IE](https://appshunter.io/developer/1705485342) |

## What reviewers say

### OneView Decision Support Sys

[App page](https://appshunter.io/ios/app/oneview-decision-support-sys/id1609255927)

**Features:** macOS Compatibility

**In-app purchases:** none


### Big Decision

[App page](https://appshunter.io/ios/app/big-decision-decide-now/id6469323941)

This app assists with tough choices by providing a structured way to evaluate options and criteria. Utilize an AI voice assistant to brainstorm and receive suggestions, making decisions clear and data-backed.

**Highlights:** AI Voice Assistant for suggestions, Create and categorize decisions, Add options and weighted criteria, Step-by-step evaluation, Data consistency updates, Visual charts and insights

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OneView Decision Support Sys free?

OneView Decision Support Sys is free to download, with no in-app purchases.

### Is Big Decision free?

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

### Do OneView Decision Support Sys or Big Decision have ads?

Neither OneView Decision Support Sys nor Big Decision shows ads.

### Which is updated more often, OneView Decision Support Sys or Big Decision?

OneView Decision Support Sys ships an update monthly, and Big Decision every 6 months. Most recently, OneView Decision Support Sys was updated on October 6, 2026 and Big Decision on September 17, 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.*