# Trip Reader (NFC) vs Calculator Keyboard

The clearest difference is in-app purchases: Trip Reader (NFC) at none against Calculator Keyboard's 2. Trip Reader (NFC) also leads on review sentiment (93% vs 77%). Calculator Keyboard's advantage is update cadence (every 3 weeks vs every 2 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Calculator Keyboard sells 2 in-app purchases, starting at $0.99 per month. Trip Reader (NFC) asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Trip Reader (NFC) against 4.7 for Calculator Keyboard. Both are backed by a comparable volume of ratings — 524 and 493 respectively. Written reviews are what separate them: 93% of Trip Reader (NFC)'s written reviews are positive against 77% of Calculator Keyboard's.

Trip Reader (NFC) ships an update every 2 months, Calculator Keyboard every 3 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Trip Reader (NFC) | Calculator Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (524 ratings)](https://appshunter.io/ios/app/trip-reader-nfc/id1488582968/reviews) | **[4.7 (493 ratings)](https://appshunter.io/ios/app/calculator-keyboard-calku/id1546065778/reviews)** |
| Number of ratings | **524** | 493 |
| Positive reviews | **92.9% of reviews** | 76.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 5 MB | 3 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Domosekai Limited](https://appshunter.io/developer/1488582967) | [Supagarn Pattananuchart](https://appshunter.io/developer/1488328374) |

## What reviewers say

### Trip Reader (NFC)

[App page](https://appshunter.io/ios/app/trip-reader-nfc/id1488582968)

Access your Chinese public transit card's balance and transaction history using your iPhone's NFC reader. View station names, monthly discounts, and bus routes without needing internet or Bluetooth. Save your travel history and sync it across devices.

**Highlights:** Read balance and history, Show station names, Track monthly discounts, Display bus route numbers, Save travel history, Sync to iCloud

**In-app purchases:** none


### Calculator Keyboard

[App page](https://appshunter.io/ios/app/calculator-keyboard-calku/id1546065778)

This app turns your keyboard into a powerful calculator, allowing you to perform calculations directly within any application. Avoid switching apps and copying numbers by calculating on the go, whether you're texting, taking notes, or browsing.

**Highlights:** Calculate within any app, Supports Dark Mode, Customizable decimal points, Scientific calculator functions, Calculation history access, Keyboard feedback options

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calku PRO (1 Month) | $0.99 | per month |
| Calku Pro - Lifetime | $5.99 | one-time |

**What reviewers like**

- 👍 Very useful application
- 🚀 Handy calculator within keyboard
- 💡 Innovative idea for an app
- 👍 Easy to use
- 🔒 Respects user privacy

**What reviewers complain about**

- 🐛 Cannot delete the app
- 🐛 Buggy at times
- 🐛 Non-standard division/multiplication symbols
- 🐛 Incorrect calculations
- 🐛 Doesn't work on all apps initially

**Reported bugs**

- Cannot delete the app
- App is buggy sometimes
- Non-standard division and multiplication symbols not recognized by other apps
- Incorrect calculations (e.g., 3.10 / 1000 = 0)
- App only works on Apple Mail and Notes initially

**Requested features**

- Add thousands separator for numbers
- Haptic feedback on key presses
- Option to hide computation in text box
- History button on main page
- Option for standard multiplication and division


## Frequently asked questions

### Is Trip Reader (NFC) free?

Trip Reader (NFC) is free to download, with no in-app purchases.

### Is Calculator Keyboard free?

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

### Which has better reviews, Trip Reader (NFC) or Calculator Keyboard?

Calculator Keyboard is rated higher. Trip Reader (NFC) averages 4.7 out of 5 from 524 ratings, while Calculator Keyboard averages 4.7 from 493 ratings.

### Do Trip Reader (NFC) or Calculator Keyboard have ads?

Neither Trip Reader (NFC) nor Calculator Keyboard shows ads.

### Which is updated more often, Trip Reader (NFC) or Calculator Keyboard?

Trip Reader (NFC) ships an update every 2 months, and Calculator Keyboard every 3 weeks. Most recently, Trip Reader (NFC) was updated on October 26, 2026 and Calculator Keyboard on October 27, 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.*