# Protractor, Level vs Trueline

The clearest difference is ads: Protractor, Level at none against Trueline's shown. Trueline's advantage is update cadence (daily vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Protractor, Level ships an update fortnightly, Trueline daily. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Protractor, Level | Trueline |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Daily** |
| Size | 2 MB | 12 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Streamlined Studios](https://appshunter.io/developer/1802378603) | [Edge Analytics s.r.o.](https://appshunter.io/developer/1867465595) |

## What reviewers say

### Protractor, Level

[App page](https://appshunter.io/ios/app/protractor-level-notch/id6795315730)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notch Pro | $2.99 | one-time |


### Trueline

[App page](https://appshunter.io/ios/app/trueline-level-tool/id6800032249)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trueline Pro | $6.99 | one-time |


## Frequently asked questions

### Is Protractor, Level free?

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

### Is Trueline free?

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

### Do Protractor, Level or Trueline have ads?

Trueline shows ads; Protractor, Level does not.

### Which is updated more often, Protractor, Level or Trueline?

Protractor, Level ships an update fortnightly, and Trueline daily. Most recently, Protractor, Level was updated on September 30, 2026 and Trueline on October 3, 2026.

---

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