# Basic Calculations vs Zealway Sterilization

The clearest difference is in-app purchases: Zealway Sterilization at none against Basic Calculations's 5. Basic Calculations's advantage is update cadence (every 3 weeks vs every 29 months) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Basic Calculations sells 5 in-app purchases, starting at $0.99 per month. Zealway Sterilization asks for nothing beyond the download.

Basic Calculations ships an update every 3 weeks, Zealway Sterilization every 29 months. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Basic Calculations | Zealway Sterilization |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 29 months |
| Size | 26 MB | 13 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [涛 吴](https://appshunter.io/developer/1499197098) | [Zealway(Xiamen)Instrument Inc.](https://appshunter.io/developer/1564709672) |

## What reviewers say

### Basic Calculations

[App page](https://appshunter.io/ios/app/basic-calculations/id1499197099)

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scan all functions: 1 month | $0.99 | per month |
| Scan all functions: 6 months | $1.99 | per 6 months |
| Scan all functions: 1 year | $2.99 | per year |
| Full calc | Free | one-time |
| Scan full version | $4.99 | one-time |


### Zealway Sterilization

[App page](https://appshunter.io/ios/app/zealway-sterilization/id1564709670)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Basic Calculations free?

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

### Is Zealway Sterilization free?

Zealway Sterilization is free to download, with no in-app purchases.

### Do Basic Calculations or Zealway Sterilization have ads?

Neither Basic Calculations nor Zealway Sterilization shows ads.

### Which is updated more often, Basic Calculations or Zealway Sterilization?

Basic Calculations ships an update every 3 weeks, and Zealway Sterilization every 29 months. Most recently, Basic Calculations was updated on October 8, 2026 and Zealway Sterilization on October 14, 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.*