# Bubble Level + Measure Kit vs Notebook Calculator

The clearest difference is review sentiment: Notebook Calculator at 100% against Bubble Level + Measure Kit's 13%. Notebook Calculator also leads on iOS requirement (15.6 vs 17.0). Bubble Level + Measure Kit's advantage is price (Free vs $1.99) and update cadence (every 4 months vs every 40 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

Bubble Level + Measure Kit is free to download; Notebook Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Bubble Level + Measure Kit ships an update every 4 months, Notebook Calculator every 40 months. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Bubble Level + Measure Kit | Notebook Calculator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 12.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 40 months |
| Monetization | Paid | Paid |
| Size | 3 MB | 4 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Sensonet](https://appshunter.io/developer/793745582) | [俊 姜](https://appshunter.io/developer/974809005) |

## What reviewers say

### Bubble Level + Measure Kit

[App page](https://appshunter.io/ios/app/bubble-level-plus-measure-kit/id806787408)

This utility app turns your device into a high-precision spirit level. Measure angles on any surface with a beautifully designed interface. Available at a special limited-time price.

**Highlights:** High precision spirit level, Angle measurement, Beautifully designed UI, Pocket-sized utility, iPhone and iPad compatible

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


### Notebook Calculator

[App page](https://appshunter.io/ios/app/notebook-calculator/id1169182532)

This app functions as a powerful calculator with a notebook interface, allowing users to write, edit, save, and graph complex calculations. It supports a wide range of mathematical and statistical functions, including scientific and complex number calculations, with features like copy, cut, and paste for easy editing.

**Highlights:** Notebook interface for calculations, Edit, save, and graph history, Scientific and graphic calculator functions, Complex number calculations, Extensive mathematical functions, Statistical functions, File management for calculations

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

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level + Measure Kit free?

Bubble Level + Measure Kit is free to download, with no in-app purchases.

### Is Notebook Calculator free?

Notebook Calculator costs $1.99, with no in-app purchases.

### Do Bubble Level + Measure Kit or Notebook Calculator have ads?

Neither Bubble Level + Measure Kit nor Notebook Calculator shows ads.

### Which is updated more often, Bubble Level + Measure Kit or Notebook Calculator?

Bubble Level + Measure Kit ships an update every 4 months, and Notebook Calculator every 40 months. Most recently, Bubble Level + Measure Kit was updated on October 21, 2026 and Notebook Calculator on October 13, 2026.

---

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