# Open Face Chinese Calculator vs Timeruler HRSpectacles

The clearest difference is in-app purchases: Timeruler HRSpectacles at none against Open Face Chinese Calculator's 2. Timeruler HRSpectacles also leads on update cadence (every 3 days vs every 111 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Open Face Chinese Calculator sells 2 one-off in-app purchases. Timeruler HRSpectacles asks for nothing beyond the download.

Open Face Chinese Calculator ships an update every 111 months, Timeruler HRSpectacles every 3 days. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Open Face Chinese Calculator | Timeruler HRSpectacles |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 111 months | **Every 3 days** |
| Size | 104 MB | 51 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Grenland Kompetanse AS](https://appshunter.io/developer/1275044661) | [Genii Hut Technologies Corporation](https://appshunter.io/developer/1504267171) |

## What reviewers say

### Open Face Chinese Calculator

[App page](https://appshunter.io/ios/app/open-face-chinese-calculator/id1275044662)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OFC Pro – 10 000 Rounds | $6.99 | one-time |
| OFC 10 000 Round Pack | $6.99 | one-time |


### Timeruler HRSpectacles

[App page](https://appshunter.io/ios/app/timeruler-hrspectacles/id1618615390)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Open Face Chinese Calculator free?

Open Face Chinese Calculator is free to download, with in-app purchases available.

### Is Timeruler HRSpectacles free?

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

### Do Open Face Chinese Calculator or Timeruler HRSpectacles have ads?

Neither Open Face Chinese Calculator nor Timeruler HRSpectacles shows ads.

### Which is updated more often, Open Face Chinese Calculator or Timeruler HRSpectacles?

Open Face Chinese Calculator ships an update every 111 months, and Timeruler HRSpectacles every 3 days. Most recently, Open Face Chinese Calculator was updated on October 14, 2026 and Timeruler HRSpectacles on October 18, 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.*