# FieldMaster Supervisor vs Sink

The clearest difference is in-app purchases: FieldMaster Supervisor at none against Sink's 7. FieldMaster Supervisor also leads on iOS requirement (13.0 vs 16.0). Sink's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Sink sells 7 in-app purchases, starting at $1.99 per month. FieldMaster Supervisor asks for nothing beyond the download.

FieldMaster Supervisor ships an update every 4 months, Sink every 3 weeks. The most recent releases landed on October 28, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | FieldMaster Supervisor | Sink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (8 ratings)](https://appshunter.io/ios/app/sink-habit-and-event-tracker/id6448770654/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 6 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Trimble Inc.](https://appshunter.io/developer/322561665) | [RealizD Pty Ltd](https://appshunter.io/developer/1269549563) |

## What reviewers say

### FieldMaster Supervisor

[App page](https://appshunter.io/ios/app/fieldmaster-supervisor/id987403868)

**Features:** Vision Pro support

**In-app purchases:** none


### Sink

[App page](https://appshunter.io/ios/app/sink-habit-and-event-tracker/id6448770654)

This app offers a powerful yet simple way to track habits, events, and any aspect of your life. Integrate with voice assistants and spreadsheets for effortless data management and gain insights into your personal growth. Enjoy robust privacy controls and seamless iCloud backups.

**Highlights:** Track any habit or event, Siri and Shortcuts integration, Export data to CSV/JSON, AI-powered insights with SinkGPT, Apple Watch compatibility, Local data storage for privacy, iCloud backup and restore, Real-time Google Sheets sync

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $1.99 | per month |
| 1 Month | $2.99 | per month |
| 1 Month | $3.99 | per month |
| 1 Year | $19.99 | per year |
| 1 Year | $29.99 | per year |
| 1 Year | $39.99 | per year |
| Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is FieldMaster Supervisor free?

FieldMaster Supervisor is free to download, with no in-app purchases.

### Is Sink free?

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

### Do FieldMaster Supervisor or Sink have ads?

Neither FieldMaster Supervisor nor Sink shows ads.

### Which is updated more often, FieldMaster Supervisor or Sink?

FieldMaster Supervisor ships an update every 4 months, and Sink every 3 weeks. Most recently, FieldMaster Supervisor was updated on October 28, 2026 and Sink 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.*