# Calcbot 2 vs NotiHub.io

The clearest difference is in-app purchases: NotiHub.io at none against Calcbot 2's 1. NotiHub.io also leads on update cadence (every 2 weeks vs every 2 months). Calcbot 2's advantage is device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Calcbot 2 sells 1 one-off in-app purchase. NotiHub.io asks for nothing beyond the download.

Calcbot 2 ships an update every 2 months, NotiHub.io every 2 weeks. The most recent releases landed on October 23, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Calcbot 2 | NotiHub.io |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (11K ratings)](https://appshunter.io/ios/app/calcbot-2/id376694347/reviews)** | — |
| Number of ratings | **11K** | — |
| Positive reviews | 60.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 20 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tapbots](https://appshunter.io/developer/293642940) | [Abdi Mohamud](https://appshunter.io/developer/1561420286) |

## What reviewers say

### Calcbot 2

[App page](https://appshunter.io/ios/app/calcbot-2/id376694347)

This app offers a smart calculator with a history tape and expression view to track your calculations. It includes over 500 unit conversions and scientific functions, with an Apple Watch extension for on-the-go use.

**Highlights:** History tape for saved calculations, Expression view for typed input, Over 500 unit conversions, Apple Watch extension, Scientific functions in landscape, Favorites for instant access

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calcbot Pro | $1.99 | one-time |

**What reviewers like**

- 💻 Flexible calculator & conversions
- 📝 Comprehensive history tape
- 🎨 Customizable themes and icons
- ⌚️ Apple Watch app
- 🔢 Supports advanced calculations

**What reviewers complain about**

- ⚠️ Lack of updates and support
- 🚫 Removing free features behind paywall
- 🐞 Bugs and glitches (history tape issues, crashing)
- 🕰️ Slow loading times
- 🤔 Unintuitive interface for conversions

**Reported bugs**

- History tape not recording all calculations
- Conversion settings not syncing to Apple Watch
- App crashing on launch for some users
- Blank app icons after iOS updates

**Requested features**

- Dark mode option
- Widgets for quick access
- More currency and unit conversions
- Improved Apple Watch integration
- Ability to edit calculations in history tape


### NotiHub.io

[App page](https://appshunter.io/ios/app/notihubio/id6474688757)

**In-app purchases:** none


## Frequently asked questions

### Is Calcbot 2 free?

Calcbot 2 is free to download, with in-app purchases available.

### Is NotiHub.io free?

NotiHub.io is free to download, with no in-app purchases.

### Do Calcbot 2 or NotiHub.io have ads?

Neither Calcbot 2 nor NotiHub.io shows ads.

### Which is updated more often, Calcbot 2 or NotiHub.io?

Calcbot 2 ships an update every 2 months, and NotiHub.io every 2 weeks. Most recently, Calcbot 2 was updated on October 23, 2026 and NotiHub.io on October 10, 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.*