# Showbie vs Uncertainty Calculator

The clearest difference is price: Showbie at Free against Uncertainty Calculator's $3.99. Showbie also leads on update cadence (every 8 days vs every 3 months) and ratings volume (240 vs 1). Uncertainty Calculator's advantage is rating (5.0 vs 3.7) and in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Showbie is free to download; Uncertainty Calculator costs $3.99 up front. Showbie sells 1 one-off in-app purchase. Uncertainty Calculator asks for nothing beyond the download.

Uncertainty Calculator holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Showbie has 240 ratings behind it against 1, so its average is the more settled of the two.

Showbie ships an update every 8 days, Uncertainty Calculator every 3 months. The most recent releases landed on October 29, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Showbie | Uncertainty Calculator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [3.7 (240 ratings)](https://appshunter.io/ios/app/showbie/id548898085/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** |
| Number of ratings | **240** | 1 |
| Positive reviews | 35.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 297 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Showbie Inc.](https://appshunter.io/developer/523263741) | [Roman Volinsky](https://appshunter.io/developer/977951850) |

## What reviewers say

### Showbie

[App page](https://appshunter.io/ios/app/showbie/id548898085)

This app facilitates paperless learning by allowing teachers to personalize assignments and provide detailed feedback on student work. It supports various feedback methods, including digital ink, text, and voice annotations, and enables the creation of digital portfolios for students. Parents can also be invited to view student progress.

**Highlights:** Personalize assignments and feedback, Digital ink, text, and voice annotations, Create digital student portfolios, Share work from compatible apps, Real-time class assessment, Private student chat, Parental access to student work

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Showbie Pro | $239.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient workflow
- 📚 Helpful for learning
- 🤝 Good for collaboration

**What reviewers complain about**

- 🐛 Frequent crashes and glitches
- 💾 Unreliable file saving and syncing
- 🕰️ Slow performance and lag
- 🔍 Confusing navigation and UI

**Reported bugs**

- Text boxes disappearing or moving unexpectedly
- Notifications not working correctly
- Assignments not uploading or disappearing
- Compatibility issues on older devices

**Requested features**

- Calendar view for assignments
- More annotation tools and customization
- Offline mode for accessing content
- Better integration with other apps


### Uncertainty Calculator

[App page](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440)

This app allows users to perform error propagation calculations for mathematical expressions involving uncertain variables. It supports absolute and relative error inputs, various functions, and trigonometric calculations in degrees or radians. The tool helps ensure accurate reporting of results based on estimated errors.

**Highlights:** Error propagation calculations, Absolute and relative error input, Support for mathematical functions, Trigonometric calculations (degrees/radians), Variable combination in expressions, Significant figure guidance

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

**In-app purchases:** none


## Frequently asked questions

### Is Showbie free?

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

### Is Uncertainty Calculator free?

Uncertainty Calculator costs $3.99, with no in-app purchases.

### Which has better reviews, Showbie or Uncertainty Calculator?

Uncertainty Calculator is rated higher. Showbie averages 3.7 out of 5 from 240 ratings, while Uncertainty Calculator averages 5.0 from 1 ratings.

### Do Showbie or Uncertainty Calculator have ads?

Neither Showbie nor Uncertainty Calculator shows ads.

### Which is updated more often, Showbie or Uncertainty Calculator?

Showbie ships an update every 8 days, and Uncertainty Calculator every 3 months. Most recently, Showbie was updated on October 29, 2026 and Uncertainty Calculator on October 18, 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.*