# Bubble Level + Spirit Level vs StringAlignPro

The clearest difference is price: Bubble Level + Spirit Level at Free against StringAlignPro's $9.99. StringAlignPro's advantage is in-app purchases (none vs 7) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Bubble Level + Spirit Level is free to download; StringAlignPro costs $9.99 up front. Bubble Level + Spirit Level sells 7 in-app purchases, starting at $0.99 per 7 days. StringAlignPro asks for nothing beyond the download.

Bubble Level + Spirit Level ships an update every 3 weeks, StringAlignPro every 2 weeks. The most recent releases landed on September 30, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Bubble Level + Spirit Level | StringAlignPro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.4 (34 ratings)](https://appshunter.io/ios/app/bubble-level-plus-spirit-level/id1547834136/reviews)** | — |
| Number of ratings | **34** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 2 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [RaceTracs Ltd](https://appshunter.io/developer/1852276263) |

## What reviewers say

### Bubble Level + Spirit Level

[App page](https://appshunter.io/ios/app/bubble-level-plus-spirit-level/id1547834136)

Transform your smartphone into a precise measuring tool. This application offers two modes for accurately leveling surfaces or measuring angles, with calibration made simple. It's ideal for tasks like hanging pictures, checking table levels, or calculating roof pitches.

**Highlights:** Bubble level and spirit level modes, Accurate to one tenth of a degree, Easy calibration, Camera support, Multiple color schemes, Angle and slope measurement

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Level - Weekly | $0.99 | per 7 days |
| Bubble Level - Weekly | $1.99 | per 7 days |
| Bubble Level - Annual | $6.99 | per year |
| Bubble Level - Annual | $8.99 | per year |
| Bubble Level - Lifetime Discount | $9.99 | one-time |
| Bubble Level - Lifetime Premium | $12.99 | one-time |
| Bubble Level - Lifetime | $19.99 | one-time |


### 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 + Spirit Level free?

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

### Is StringAlignPro free?

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

### Do Bubble Level + Spirit Level or StringAlignPro have ads?

Bubble Level + Spirit Level shows ads; StringAlignPro does not.

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

Bubble Level + Spirit Level ships an update every 3 weeks, and StringAlignPro every 2 weeks. Most recently, Bubble Level + Spirit Level was updated on September 30, 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.*