# Bubble Level Tool vs StringAlignPro

The clearest difference is price: Bubble Level Tool at Free against StringAlignPro's $9.99. Bubble Level Tool also leads on update cadence (weekly vs every 2 weeks). StringAlignPro's advantage is in-app purchases (none vs 9). On ads, device support and iOS requirement there is nothing between them.

Bubble Level Tool is free to download; StringAlignPro costs $9.99 up front. Bubble Level Tool sells 9 in-app purchases, starting at $3.99 per 7 days. StringAlignPro asks for nothing beyond the download.

Bubble Level Tool ships an update weekly, StringAlignPro every 2 weeks. The most recent releases landed on October 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Bubble Level Tool | StringAlignPro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.4 (2.5K ratings)](https://appshunter.io/ios/app/bubble-level-tool-digital/id1662018802/reviews)** | — |
| Number of ratings | **2.5K** | — |
| Positive reviews | 6.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Subscription | — |
| Size | 5 MB | 2 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rihab Mehboob](https://appshunter.io/developer/1441916319) | [RaceTracs Ltd](https://appshunter.io/developer/1852276263) |

## What reviewers say

### Bubble Level Tool

[App page](https://appshunter.io/ios/app/bubble-level-tool-digital/id1662018802)

Measure precise angles and levels with your device. Easily switch between portrait, landscape, and surface level modes. Lock and reset angles for accurate measurements.

**Highlights:** Measure current device angle, Reset angle, Lock angle, Portrait mode, Landscape mode, Surface level

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble 1 Week | $3.99 | per 7 days |
| Bubble 1 Week | $4.99 | per 7 days |
| Bubble 1 Month | $5.99 | per month |
| Bubble 1 Month | $9.99 | per month |
| Bubble 1 Year | $24.99 | per year |
| Bubble 6 Months | $29.99 | per 6 months |
| Bubble 1 Year | $39.99 | per year |
| Bubble Lifetime | $17.99 | one-time |
| Bubble Lifetime | $69.99 | one-time |

**What reviewers like**

- ⭐️ Useful app
- 🤠 Handy when needed
- 👍 It simply works

**What reviewers complain about**

- 💰 Expensive subscription
- 🚫 Unusable without paying
- 📢 Constant upsell pop-ups
- 🕰️ Limited free trial
- 🤯 Frustrating experience

**Reported bugs**

- Inaccurate level readings
- Compatibility issues with older devices

**Requested features**

- Percentage slope display option
- Ability to switch between degree and percent
- Refund/cancellation options


### StringAlignPro

[App page](https://appshunter.io/ios/app/stringalignpro/id6780426421)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level Tool free?

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

### Is StringAlignPro free?

StringAlignPro costs $9.99, with no in-app purchases.

### Do Bubble Level Tool or StringAlignPro have ads?

Neither Bubble Level Tool nor StringAlignPro shows ads.

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

Bubble Level Tool ships an update weekly, and StringAlignPro every 2 weeks. Most recently, Bubble Level Tool was updated on October 10, 2026 and StringAlignPro on September 21, 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.*