# Nexus universal calculator vs WillOS

The clearest difference is price: Nexus universal calculator at Free against WillOS's $3.99. Nexus universal calculator also leads on update cadence (weekly vs every 2 weeks). WillOS's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Nexus universal calculator is free to download; WillOS costs $3.99 up front. Nexus universal calculator sells 3 in-app purchases, starting at $2.99 per month and WillOS sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Nexus universal calculator ships an update weekly, WillOS every 2 weeks. The most recent releases landed on October 17, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Nexus universal calculator | WillOS |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/nexus-universal-calculator/id6746715232/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 67 MB | 6 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nataliia Vereshchak](https://appshunter.io/developer/1818074298) | [艺景 张](https://appshunter.io/developer/1818288159) |

## What reviewers say

### Nexus universal calculator

[App page](https://appshunter.io/ios/app/nexus-universal-calculator/id6746715232)

A smart calculator that remembers your calculations, allows you to reuse results in new formulas, and includes unit and currency conversion. It offers cloud sync for seamless access across devices and a clean design for everyday use, budgeting, and studying.

**Highlights:** Calculator with history, Smart formula builder, Unit and currency converter, Cloud sync across devices, Clean and simple design, Reuse past results as variables

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Month | $2.99 | per month |
| Premium year | $9.99 | per year |
| Lifetime Premium Features | $199.00 | one-time |


### WillOS

[App page](https://appshunter.io/ios/app/willos/id6748278061)

This productivity tool helps users organize their time and prioritize tasks. It offers features to stay aware of time, focus on high-value activities, and manage tasks across multiple devices.

**Highlights:** Time awareness, Task prioritization, Cross-device task management, Organized time management

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wishing Well (人・ω・。) | $0.99 | one-time |
| Fuel me (//ω//) | $2.99 | one-time |
| Feed me (//ω//) | $4.99 | one-time |
| PRO | $6.99 | one-time |
| Feed me (//ω//) | $6.99 | one-time |


## Frequently asked questions

### Is Nexus universal calculator free?

Nexus universal calculator is free to download, with in-app purchases available.

### Is WillOS free?

WillOS costs $3.99, and also offers in-app purchases.

### Do Nexus universal calculator or WillOS have ads?

Nexus universal calculator shows ads; WillOS does not.

### Which is updated more often, Nexus universal calculator or WillOS?

Nexus universal calculator ships an update weekly, and WillOS every 2 weeks. Most recently, Nexus universal calculator was updated on October 17, 2026 and WillOS on October 9, 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.*