# thaiapp calculator vs Parallel

The clearest difference is in-app purchases: thaiapp calculator at none against Parallel's 1. thaiapp calculator also leads on iOS requirement (15.0 vs 18.0). Parallel's advantage is update cadence (every 6 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Parallel sells 1 one-off in-app purchase. thaiapp calculator asks for nothing beyond the download.

thaiapp calculator ships an update fortnightly, Parallel every 6 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | thaiapp calculator | Parallel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/parallel-multi-calculator/id6794806258/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | — | Free |
| Size | 7 MB | 16 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tanatep Pichetvasin](https://appshunter.io/developer/1843647790) | [Evgenii Chizhov](https://appshunter.io/developer/6794806260) |

## What reviewers say

### thaiapp calculator

[App page](https://appshunter.io/ios/app/thaiapp-calculator/id6761050901)

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

**In-app purchases:** none


### Parallel

[App page](https://appshunter.io/ios/app/parallel-multi-calculator/id6794806258)

Perform multiple calculations simultaneously with a drag-and-drop interface. Features a scientific calculator, currency and crypto converter, and history saving with optional privacy locks. Customize with themes and fonts.

**Highlights:** Run 2, 3, or 4 calculations side-by-side, Drag and drop calculation arrangement, Scientific calculator mode, Currency and crypto converter, Save calculation history with notes, Face ID/passcode lock for privacy, Home screen widget and Quick Menu access

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Parallel Pro | $2.99 | one-time |


## Frequently asked questions

### Is thaiapp calculator free?

thaiapp calculator is free to download, with no in-app purchases.

### Is Parallel free?

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

### Do thaiapp calculator or Parallel have ads?

Neither thaiapp calculator nor Parallel shows ads.

### Which is updated more often, thaiapp calculator or Parallel?

thaiapp calculator ships an update fortnightly, and Parallel every 6 days. Most recently, thaiapp calculator was updated on October 31, 2026 and Parallel on November 6, 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.*