# iSeal Calculator vs Tiretime

The clearest difference is in-app purchases: iSeal Calculator at none against Tiretime's 1. Tiretime's advantage is update cadence (every 9 days vs every 14 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Tiretime sells 1 one-off in-app purchase. iSeal Calculator asks for nothing beyond the download.

iSeal Calculator ships an update every 14 months, Tiretime every 9 days. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | iSeal Calculator | Tiretime |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 9 days** |
| Size | 15 MB | 35 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Rex Hidle & Associates, LLC](https://appshunter.io/developer/1803845213) | [NanoHawk](https://appshunter.io/developer/1805616299) |

## What reviewers say

### iSeal Calculator

[App page](https://appshunter.io/ios/app/iseal-calculator/id6743659133)

**Features:** macOS Compatibility

**In-app purchases:** none


### Tiretime

[App page](https://appshunter.io/ios/app/tiretime-dot-tire-date-code/id6755887918)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tire Time Pro | $0.99 | one-time |


## Frequently asked questions

### Is iSeal Calculator free?

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

### Is Tiretime free?

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

### Do iSeal Calculator or Tiretime have ads?

Neither iSeal Calculator nor Tiretime shows ads.

### Which is updated more often, iSeal Calculator or Tiretime?

iSeal Calculator ships an update every 14 months, and Tiretime every 9 days. Most recently, iSeal Calculator was updated on October 7, 2026 and Tiretime on October 25, 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.*