# calculator DUO vs DevCheck

The clearest difference is ads: DevCheck at none against calculator DUO's shown. DevCheck also leads on update cadence (every 5 days vs every 11 days). calculator DUO's advantage is ratings volume (3 vs 1). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. calculator DUO sells 1 one-off in-app purchase and DevCheck sells 3 in-app purchases, starting at $2.99 per month. 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 calculator DUO against 5.0 for DevCheck. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

calculator DUO ships an update every 11 days, DevCheck every 5 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | calculator DUO | DevCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/calculator-duo/id6739860116/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/devcheck-cpu-info-and-benchmark/id6819828162/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 11 days | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 24 MB |
| Requires iOS | **16.5** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wenbin lei](https://appshunter.io/developer/1787331500) | [Ex Solutions Inc.](https://appshunter.io/developer/6819828164) |

## What reviewers say

### calculator DUO

[App page](https://appshunter.io/ios/app/calculator-duo/id6739860116)

This utility app offers a modern calculator with a visual history feature, eliminating the need to memorize previous calculations. It also includes a comprehensive unit converter and a tip calculator that bases tips on pre-tax amounts.

**Highlights:** Visual history calculator (RESULT SHELF™), Unit converter, Tip calculator (pre-tax), Distraction-free design, Precise and efficient

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### DevCheck

[App page](https://appshunter.io/ios/app/devcheck-cpu-info-and-benchmark/id6819828162)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DevCheck Pro Monthly | $2.99 | per month |
| DevCheck Pro Yearly | $19.99 | per year |
| DevCheck Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is calculator DUO free?

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

### Is DevCheck free?

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

### Which has better reviews, calculator DUO or DevCheck?

calculator DUO and DevCheck are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do calculator DUO or DevCheck have ads?

calculator DUO shows ads; DevCheck does not.

### Which is updated more often, calculator DUO or DevCheck?

calculator DUO ships an update every 11 days, and DevCheck every 5 days. Most recently, calculator DUO was updated on October 30, 2026 and DevCheck on October 29, 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.*