# Panecal Plus Sci. Calculator vs Stopwatch Library

The clearest difference is price: Stopwatch Library at Free against Panecal Plus Sci. Calculator's $2.99. Stopwatch Library also leads on update cadence (every 3 days vs every 3 months). Panecal Plus Sci. Calculator's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 17.0). On ads and device support there is nothing between them.

Stopwatch Library is free to download; Panecal Plus Sci. Calculator costs $2.99 up front. Stopwatch Library sells 1 one-off in-app purchase. Panecal Plus Sci. Calculator asks for nothing beyond the download.

Panecal Plus Sci. Calculator ships an update every 3 months, Stopwatch Library every 3 days. The most recent releases landed on October 15, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Panecal Plus Sci. Calculator | Stopwatch Library |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (363 ratings)](https://appshunter.io/ios/app/panecal-plus-sci-calculator/id672649451/reviews)** | — |
| Number of ratings | **363** | — |
| Positive reviews | 79.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 18 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Noriyasu Kutsuzawa](https://appshunter.io/developer/668500806) | [Naoyuki Hasegawa](https://appshunter.io/developer/6777422704) |

## What reviewers say

### Panecal Plus Sci. Calculator

[App page](https://appshunter.io/ios/app/panecal-plus-sci-calculator/id672649451)

This app functions as a scientific calculator with a multiline editable display. It allows users to view and modify formulas as they are entered, preventing errors. Past calculations can be reused, and variable memory enables efficient recalculations.

**Highlights:** Multiline editable formulas, Re-calculation of past formulas, Cursor-based editing and swipe navigation, Copy and paste formulas, Formula and answer history, Number base conversion (binary, octal, decimal, hex), Variable memory

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

**In-app purchases:** none


### Stopwatch Library

[App page](https://appshunter.io/ios/app/stopwatch-library/id6794338987)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を削除 | $2.99 | one-time |


## Frequently asked questions

### Is Panecal Plus Sci. Calculator free?

Panecal Plus Sci. Calculator costs $2.99, with no in-app purchases.

### Is Stopwatch Library free?

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

### Do Panecal Plus Sci. Calculator or Stopwatch Library have ads?

Neither Panecal Plus Sci. Calculator nor Stopwatch Library shows ads.

### Which is updated more often, Panecal Plus Sci. Calculator or Stopwatch Library?

Panecal Plus Sci. Calculator ships an update every 3 months, and Stopwatch Library every 3 days. Most recently, Panecal Plus Sci. Calculator was updated on October 15, 2026 and Stopwatch Library on September 28, 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.*