# Tug Calc vs iBigCalc

The clearest difference is in-app purchases: iBigCalc at none against Tug Calc's 4. Tug Calc's advantage is ads (none vs shown) and update cadence (every 5 days vs every 3 weeks). On price there is nothing between them.

Both are free to download. Tug Calc sells 4 in-app purchases, starting at $0.99 per month. iBigCalc asks for nothing beyond the download.

Tug Calc ships an update every 5 days, iBigCalc every 3 weeks. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Tug Calc | iBigCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 54 MB | 5 MB |
| Requires iOS | **13.0** | 17 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [嘉欣 胡](https://appshunter.io/developer/1640395440) | [Manh Phi Nguyen](https://appshunter.io/developer/1461707344) |

## What reviewers say

### Tug Calc

[App page](https://appshunter.io/ios/app/tug-calc/id6744523761)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscriptions | $0.99 | per month |
| Quarterly Subscriptions | $0.99 | per 3 months |
| Annual Subscription | $2.99 | per year |
| Perpetual Subscription | $4.99 | one-time |


### iBigCalc

[App page](https://appshunter.io/ios/app/ibigcalc/id6760924865)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tug Calc free?

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

### Is iBigCalc free?

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

### Do Tug Calc or iBigCalc have ads?

iBigCalc shows ads; Tug Calc does not.

### Which is updated more often, Tug Calc or iBigCalc?

Tug Calc ships an update every 5 days, and iBigCalc every 3 weeks. Most recently, Tug Calc was updated on October 13, 2026 and iBigCalc on October 16, 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.*