# Tire Size Calculator vs Countdown Log

The clearest difference is update cadence: Countdown Log at every 5 days against Tire Size Calculator's every 6 weeks. Countdown Log also leads on price ($1.99 vs $3.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Tire Size Calculator costs $3.99 and Countdown Log $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tire Size Calculator ships an update every 6 weeks, Countdown Log every 5 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Tire Size Calculator | Countdown Log |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Positive reviews | 41.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Paid | — |
| Size | 4 MB | 25 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cheng Fan](https://appshunter.io/developer/599384923) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### Tire Size Calculator

[App page](https://appshunter.io/ios/app/tire-size-calculator/id599384920)

Easily compare tire and wheel specifications for upgrades. Calculate equivalent sprung weight differences and get safe, performance-enhancing recommendations. Supports both Imperial and Metric units.

**Highlights:** Compare tire and wheel specs, Get upgrade recommendations, Calculate sprung weight difference, Supports Imperial and Metric units, Visual tire comparison graphs, Adjustable difference variables

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

**In-app purchases:** none


### Countdown Log

[App page](https://appshunter.io/ios/app/countdown-log-days-until/id6767731218)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tire Size Calculator free?

Tire Size Calculator costs $3.99, with no in-app purchases.

### Is Countdown Log free?

Countdown Log costs $1.99, with no in-app purchases.

### Do Tire Size Calculator or Countdown Log have ads?

Neither Tire Size Calculator nor Countdown Log shows ads.

### Which is updated more often, Tire Size Calculator or Countdown Log?

Tire Size Calculator ships an update every 6 weeks, and Countdown Log every 5 days. Most recently, Tire Size Calculator was updated on November 1, 2026 and Countdown Log on October 31, 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.*