# Dr VB800 vs Pipe Diameter Calculators

The clearest difference is in-app purchases: Dr VB800 at none against Pipe Diameter Calculators's 1. Dr VB800 also leads on update cadence (every 5 weeks vs every 20 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. Pipe Diameter Calculators sells 1 one-off in-app purchase. Dr VB800 asks for nothing beyond the download.

Dr VB800 ships an update every 5 weeks, Pipe Diameter Calculators every 20 months. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Dr VB800 | Pipe Diameter Calculators |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 20 months |
| Size | 41 MB | 59 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TECOM CO., LTD.](https://appshunter.io/developer/490537952) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### Dr VB800

[App page](https://appshunter.io/ios/app/dr-vb800/id1550701890)

**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 Dr VB800 free?

Dr VB800 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 Dr VB800 or Pipe Diameter Calculators have ads?

Neither Dr VB800 nor Pipe Diameter Calculators shows ads.

### Which is updated more often, Dr VB800 or Pipe Diameter Calculators?

Dr VB800 ships an update every 5 weeks, and Pipe Diameter Calculators every 20 months. Most recently, Dr VB800 was updated on October 25, 2026 and Pipe Diameter Calculators on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*