# EverSafe OS vs Pipe Diameter Calculators

The clearest difference is in-app purchases: EverSafe OS at none against Pipe Diameter Calculators's 1. EverSafe OS also leads on update cadence (every 4 months vs every 20 months) and iOS requirement (13.4 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Pipe Diameter Calculators sells 1 one-off in-app purchase. EverSafe OS asks for nothing beyond the download.

EverSafe OS ships an update every 4 months, Pipe Diameter Calculators every 20 months. The most recent releases landed on October 27, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | EverSafe OS | Pipe Diameter Calculators |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 20 months |
| Size | 36 MB | 59 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ARAMARK Corporation](https://appshunter.io/developer/541912853) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### EverSafe OS

[App page](https://appshunter.io/ios/app/eversafe-os/id1516953805)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pipe Diameter Calculators

[App page](https://appshunter.io/ios/app/pipe-diameter-calculators/id6743020859)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is EverSafe OS free?

EverSafe OS is free to download, with no in-app purchases.

### Is Pipe Diameter Calculators free?

Pipe Diameter Calculators is free to download, with in-app purchases available.

### Do EverSafe OS or Pipe Diameter Calculators have ads?

Neither EverSafe OS nor Pipe Diameter Calculators shows ads.

### Which is updated more often, EverSafe OS or Pipe Diameter Calculators?

EverSafe OS ships an update every 4 months, and Pipe Diameter Calculators every 20 months. Most recently, EverSafe OS was updated on October 27, 2026 and Pipe Diameter Calculators on November 3, 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.*