# Y+ Calculator vs 1Calc

The clearest difference is rating: Y+ Calculator at 3.0 against 1Calc's 2.0. Y+ Calculator also leads on in-app purchases (none vs 3) and ads (none vs shown). 1Calc's advantage is update cadence (fortnightly vs every 8 months). On price and ratings volume there is nothing between them.

Both are free to download. 1Calc sells 3 in-app purchases, starting at $0.99 per month. Y+ Calculator asks for nothing beyond the download.

Y+ Calculator holds the better App Store score, 3.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Y+ Calculator ships an update every 8 months, 1Calc fortnightly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Y+ Calculator | 1Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/y-plus-calculator/id650011524/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/1calc-one-calculator/id6502853473/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 6 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cadence Design Systems, Inc.](https://appshunter.io/developer/1318385448) | [Asim Roy](https://appshunter.io/developer/1703408134) |

## What reviewers say

### Y+ Calculator

[App page](https://appshunter.io/ios/app/y-plus-calculator/id650011524)

This app calculates the necessary grid spacing for computational fluid dynamics (CFD) simulations. It helps engineers determine near-wall cell height for accurate viscous flow computations. Supports both SI and Imperial units.

**Highlights:** Calculate grid spacing for target y+ values, Supports viscous CFD computations, Works in SI or Imperial units, Resets to sea-level conditions, Based on established fluid mechanics theory

**Features:** macOS Compatibility

**In-app purchases:** none


### 1Calc

[App page](https://appshunter.io/ios/app/1calc-one-calculator/id6502853473)

This app offers a streamlined calculator experience with a history feature to review past calculations. It boasts a modern design with customizable themes and ensures a premium user experience by being ad-free for premium users. Enhanced percentage calculation logic provides accurate results.

**Highlights:** History functionality, Customizable themes, Ad-free premium experience, Accurate percentage calculation, Smart and modern design

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $3.99 | per year |
| Lifetime | $8.99 | one-time |


## Frequently asked questions

### Is Y+ Calculator free?

Y+ Calculator is free to download, with no in-app purchases.

### Is 1Calc free?

1Calc is free to download, with in-app purchases available.

### Which has better reviews, Y+ Calculator or 1Calc?

Y+ Calculator is rated higher. Y+ Calculator averages 3.0 out of 5 from 1 ratings, while 1Calc averages 2.0 from 1 ratings.

### Do Y+ Calculator or 1Calc have ads?

1Calc shows ads; Y+ Calculator does not.

### Which is updated more often, Y+ Calculator or 1Calc?

Y+ Calculator ships an update every 8 months, and 1Calc fortnightly. Most recently, Y+ Calculator was updated on November 1, 2026 and 1Calc on November 4, 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.*