# Mastowatch vs Process Engineer Calc

The clearest difference is in-app purchases: Process Engineer Calc at none against Mastowatch's 4. Process Engineer Calc also leads on update cadence (every 10 days vs monthly) and iOS requirement (17.0 vs 26.0). Mastowatch's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Mastowatch sells 4 one-off in-app purchases. Process Engineer Calc asks for nothing beyond the download.

Mastowatch ships an update monthly, Process Engineer Calc every 10 days. The most recent releases landed on June 1, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Mastowatch | Process Engineer Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (16 ratings)](https://appshunter.io/ios/app/mastowatch-mastodon-servers/id1662271463/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 11 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Justin Ferrell](https://appshunter.io/developer/1662266030) | [冯泰 蔡](https://appshunter.io/developer/1896641064) |

## What reviewers say

### Mastowatch

[App page](https://appshunter.io/ios/app/mastowatch-mastodon-servers/id1662271463)

Discover and explore Mastodon servers with this utility app. Get detailed statistics, view trending content, and check server rules and limitations without needing to log in.

**Highlights:** Find Mastodon servers, Inspect server details, View user and post counts, See trending links and posts, Check blocked domains, Discover custom emoji, Review server rules

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Mastowatch Pro | $3.99 | one-time |
| Medium tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


### Process Engineer Calc

[App page](https://appshunter.io/ios/app/process-engineer-calc-lms/id6774295442)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mastowatch free?

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

### Is Process Engineer Calc free?

Process Engineer Calc is free to download, with no in-app purchases.

### Do Mastowatch or Process Engineer Calc have ads?

Neither Mastowatch nor Process Engineer Calc shows ads.

### Which is updated more often, Mastowatch or Process Engineer Calc?

Mastowatch ships an update monthly, and Process Engineer Calc every 10 days. Most recently, Mastowatch was updated on June 1, 2026 and Process Engineer Calc on September 12, 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.*