# FieldBus Toolkit vs LineKeeper

The clearest difference is ads: LineKeeper at none against FieldBus Toolkit's shown. LineKeeper also leads on update cadence (monthly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. FieldBus Toolkit sells 1 one-off in-app purchase and LineKeeper sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

FieldBus Toolkit ships an update every 3 months, LineKeeper monthly. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | FieldBus Toolkit | LineKeeper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Size | 28 MB | 22 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DONGSOO LEE](https://appshunter.io/developer/1868670088) | [Oleksandr Makarov](https://appshunter.io/developer/6791371576) |

## What reviewers say

### FieldBus Toolkit

[App page](https://appshunter.io/ios/app/fieldbus-toolkit/id6758210279)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### LineKeeper

[App page](https://appshunter.io/ios/app/linekeeper/id6791371574)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Write Unlock | $59.99 | one-time |


## Frequently asked questions

### Is FieldBus Toolkit free?

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

### Is LineKeeper free?

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

### Do FieldBus Toolkit or LineKeeper have ads?

FieldBus Toolkit shows ads; LineKeeper does not.

### Which is updated more often, FieldBus Toolkit or LineKeeper?

FieldBus Toolkit ships an update every 3 months, and LineKeeper monthly. Most recently, FieldBus Toolkit was updated on October 24, 2026 and LineKeeper on October 21, 2026.

---

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