# Xmart Calculator Pro vs Datpub

The clearest difference is price: Datpub at Free against Xmart Calculator Pro's $5.99. Datpub also leads on update cadence (every 6 days vs every 6 weeks). Xmart Calculator Pro's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.0). On ads and device support there is nothing between them.

Datpub is free to download; Xmart Calculator Pro costs $5.99 up front. Datpub sells 4 in-app purchases, starting at $4.99 per month. Xmart Calculator Pro asks for nothing beyond the download.

Xmart Calculator Pro ships an update every 6 weeks, Datpub every 6 days. The most recent releases landed on August 29, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Xmart Calculator Pro | Datpub |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[4.4 (152 ratings)](https://appshunter.io/ios/app/xmart-calculator-pro/id827740598/reviews)** | — |
| Number of ratings | **152** | — |
| Positive reviews | 84.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Monetization | Paid | — |
| Size | 13 MB | 50 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [XHLIU](https://appshunter.io/developer/460419472) | [科 杨](https://appshunter.io/developer/1450752196) |

## What reviewers say

### Xmart Calculator Pro

[App page](https://appshunter.io/ios/app/xmart-calculator-pro/id827740598)

This app functions as an intelligent, programmable calculator that allows users to define custom algebraic functions. It provides instant results as expressions are updated and offers step-by-step calculation traceability. Users can save, recall, and share their calculation history.

**Highlights:** Define custom algebraic functions, Instant calculation results, Step-by-step calculation traceability, Save and recall calculation history, Configurable appearance (colors, fonts), Includes a mortgage calculator

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💾 History saving and recall functionality
- 👍 User-friendly and intuitive interface
- 🎨 Customizable colors and themes
- 💡 Custom function creation and storage
- 🚀 Fast and efficient calculations

**What reviewers complain about**

- 🐛 Glitches with equals button reuse
- 🐛 Preferences window opens unexpectedly
- 📱 iPad landscape-only orientation limitation
- 🐛 Percentage calculations don't work on-the-fly
- 🐛 Decimal multiplication errors (.15*.80)

**Reported bugs**

- Illegal character error when reusing equals button result
- Preferences dialog opens on equals button tap
- Save button disappeared in history feature
- Percentage key calculations malfunction
- Decimal multiplication errors

**Requested features**

- Fraction form results display
- RPN (Reverse Polish Notation) support
- Better iPad screen optimization
- Decimal input accepting '.2' as '0.2'
- Smart decimal place display


### Datpub

[App page](https://appshunter.io/ios/app/datpub/id1662246529)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Standard Membership | $4.99 | per month |
| Advanced Membership | $8.99 | per month |
| Yearly Standard Membership | $49.99 | per year |
| Yearly Advanced Membership | $89.99 | per year |


## Frequently asked questions

### Is Xmart Calculator Pro free?

Xmart Calculator Pro costs $5.99, with no in-app purchases.

### Is Datpub free?

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

### Do Xmart Calculator Pro or Datpub have ads?

Neither Xmart Calculator Pro nor Datpub shows ads.

### Which is updated more often, Xmart Calculator Pro or Datpub?

Xmart Calculator Pro ships an update every 6 weeks, and Datpub every 6 days. Most recently, Xmart Calculator Pro was updated on August 29, 2026 and Datpub on May 17, 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.*