# 1Calc vs Math Sphere

The clearest difference is in-app purchases: Math Sphere at none against 1Calc's 3. Math Sphere also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

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

1Calc ships an update fortnightly, Math Sphere every 3 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 1Calc | Math Sphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/1calc-one-calculator/id6502853473/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 25 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Asim Roy](https://appshunter.io/developer/1703408134) | [otsuki hayato](https://appshunter.io/developer/1828600192) |

## What reviewers say

### 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 |


### Math Sphere

[App page](https://appshunter.io/ios/app/math-sphere/id6749747366)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 1Calc free?

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

### Is Math Sphere free?

Math Sphere is free to download, with no in-app purchases.

### Do 1Calc or Math Sphere have ads?

1Calc shows ads; Math Sphere does not.

### Which is updated more often, 1Calc or Math Sphere?

1Calc ships an update fortnightly, and Math Sphere every 3 weeks. Most recently, 1Calc was updated on November 4, 2026 and Math Sphere on October 30, 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.*