# NanoTire vs Smelter

The clearest difference is price: Smelter at Free against NanoTire's $1.99. Smelter also leads on update cadence (every 5 days vs every 3 months). NanoTire's advantage is in-app purchases (none vs 6). On ads, device support and iOS requirement there is nothing between them.

Smelter is free to download; NanoTire costs $1.99 up front. Smelter sells 6 one-off in-app purchases. NanoTire asks for nothing beyond the download.

NanoTire ships an update every 3 months, Smelter every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | NanoTire | Smelter |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.3 (8 ratings)](https://appshunter.io/ios/app/nanotire/id1318123313/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 20 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [恒俭 董](https://appshunter.io/developer/947356968) | [Hector Pardal Arias](https://appshunter.io/developer/1896777517) |

## What reviewers say

### NanoTire

[App page](https://appshunter.io/ios/app/nanotire/id1318123313)

Easily calculate tire conversions with this straightforward utility. Access essential tire information directly from your device's home screen with a convenient widget.

**Highlights:** Tire size conversion, Easy to use interface, Today Widget for quick info, Supports all system versions

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

**In-app purchases:** none


### Smelter

[App page](https://appshunter.io/ios/app/smelter/id6796544103)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Laboratorio Smelter | $3.99 | one-time |
| Banco del joyero | $3.99 | one-time |
| Academia Smelter | $3.99 | one-time |
| Laboratorio de materiales | $3.99 | one-time |
| Smelter Complete | $3.99 | one-time |


## Frequently asked questions

### Is NanoTire free?

NanoTire costs $1.99, with no in-app purchases.

### Is Smelter free?

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

### Do NanoTire or Smelter have ads?

Neither NanoTire nor Smelter shows ads.

### Which is updated more often, NanoTire or Smelter?

NanoTire ships an update every 3 months, and Smelter every 5 days. Most recently, NanoTire was updated on October 24, 2026 and Smelter 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.*