# Calculator AI vs DueSoon

The clearest difference is update cadence: DueSoon at every 5 days against Calculator AI's every 11 days. Calculator AI's advantage is iOS requirement (13 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calculator AI sells 2 in-app purchases, starting at $2.99 per 7 days and DueSoon sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Calculator AI ships an update every 11 days, DueSoon every 5 days. The most recent releases landed on October 13, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Calculator AI | DueSoon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/calculator-ai-math-solver/id6743835941/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 34 MB | 8 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siyong Studio](https://appshunter.io/developer/6777462143) | [Jake Eells](https://appshunter.io/developer/588162568) |

## What reviewers say

### Calculator AI

[App page](https://appshunter.io/ios/app/calculator-ai-math-solver/id6743835941)

This app offers advanced scientific calculations and an AI-powered natural language processing engine. It can solve complex math problems and answer real-world questions, while also providing personalized visual themes for a unique user experience.

**Highlights:** Advanced scientific calculations, AI-powered natural language processing, Real-world question answering, Customizable calculator skins, Matrix solutions, Currency conversion

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $2.99 | per 7 days |
| 年会员 | $19.99 | per year |


### DueSoon

[App page](https://appshunter.io/ios/app/duesoon-reminder-tracker/id6770229844)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Renewly Plus Subscription | $3.99 | per month |
| Renewly - Plus Annual | $24.99 | per year |
| Renewly Plus - Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Calculator AI free?

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

### Is DueSoon free?

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

### Do Calculator AI or DueSoon have ads?

Neither Calculator AI nor DueSoon shows ads.

### Which is updated more often, Calculator AI or DueSoon?

Calculator AI ships an update every 11 days, and DueSoon every 5 days. Most recently, Calculator AI was updated on October 13, 2026 and DueSoon on September 26, 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.*