# TTC Design Tool vs Bubble Level

The clearest difference is price: Bubble Level at Free against TTC Design Tool's $1.99. Bubble Level also leads on review sentiment (41% vs 0%) and update cadence (weekly vs every 27 months). TTC Design Tool's advantage is in-app purchases (none vs 11) and ads (none vs shown). On device support there is nothing between them.

Bubble Level is free to download; TTC Design Tool costs $1.99 up front. Bubble Level sells 11 in-app purchases, starting at $1.99 per 7 days. TTC Design Tool asks for nothing beyond the download.

TTC Design Tool ships an update every 27 months, Bubble Level weekly. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | TTC Design Tool | Bubble Level |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.5 (702 ratings)](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382/reviews)** |
| Number of ratings | — | **702** |
| Positive reviews | 0.0% of reviews | **41.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 27 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 97 MB | 43 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [The Trail Collective Pty Ltd](https://appshunter.io/developer/1215974926) | [Jens Rieckhof](https://appshunter.io/developer/354266124) |

## What reviewers say

### TTC Design Tool

[App page](https://appshunter.io/ios/app/ttc-design-tool/id1492004467)

This tool facilitates community engagement for trail design projects. It allows users to express ideas and share designs interactively, enhancing preliminary discussions and planning. It's a valuable asset for collaborative project development.

**Highlights:** Community engagement for trail projects, Share and express design ideas, Interactive and enjoyable platform, Enhances preliminary discussions, Facilitates pre-design workshops

**Features:** macOS Compatibility

**In-app purchases:** none


### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382)

This app transforms your phone into a precise leveling tool. It offers accurate angle measurement, inclination detection, and augmented reality features for DIY and professional use. Calibration is simple and quick.

**Highlights:** Ultra-precise angle measurement, Inclination and slope meter, Augmented reality ruler and protractor, Effortless one-touch calibration, Clear and easy-to-read display, User-friendly interface

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Weekly Plan | $1.99 | per 7 days |
| Spirit Level Premium – Monthly | $2.99 | per month |
| Bubble Level Premium - Weekly | $2.99 | per 7 days |
| Bubble Level Premium - Monthly | $5.99 | per month |
| Spirit Level Premium – Annual | $14.99 | per year |
| Bubble Level Premium - Annual | $19.99 | per year |
| All features - No ads | $1.99 | one-time |
| Unlock all AR features | $5.99 | one-time |
| Discount Lifetime Premium | $14.99 | one-time |
| Bubble Level PREMIUM Lifetime | $19.99 | one-time |
| Bubble Level - Lifetime Premium | $29.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🔍 Accurate angle measurements
- 🛠️ Helpful for various tasks (telescopes, leveling, etc.)

**What reviewers complain about**

- 🤑 Expensive ad removal
- 🤖 Unreliable calibration
- 💤 Constant interruptions and ads
- 🚫 Unusable due to ads

**Reported bugs**

- App crashes on launch
- Measurement point behaves erratically

**Requested features**

- Ability to calibrate the app
- Option to change the display color


## Frequently asked questions

### Is TTC Design Tool free?

TTC Design Tool costs $1.99, with no in-app purchases.

### Is Bubble Level free?

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

### Do TTC Design Tool or Bubble Level have ads?

Bubble Level shows ads; TTC Design Tool does not.

### Which is updated more often, TTC Design Tool or Bubble Level?

TTC Design Tool ships an update every 27 months, and Bubble Level weekly. Most recently, TTC Design Tool was updated on September 27, 2026 and Bubble Level 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.*