# 1 / f Clock vs BitTime

The clearest difference is update cadence: BitTime at monthly against 1 / f Clock's every 7 months. 1 / f Clock's advantage is iOS requirement (8.1 vs 17.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 1 / f Clock sells 1 one-off in-app purchase and BitTime sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

1 / f Clock ships an update every 7 months, BitTime monthly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | 1 / f Clock | BitTime |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Size | 47 MB | 6 MB |
| Requires iOS | **8.1** | 17.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Y. MOCHIDUKI](https://appshunter.io/developer/556544131) | [Clete Blackwell II](https://appshunter.io/developer/505744974) |

## What reviewers say

### 1 / f Clock

[App page](https://appshunter.io/ios/app/1-f-clock/id730286100)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### BitTime

[App page](https://appshunter.io/ios/app/bittime-binary-clock/id6749833995)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $2.99 | one-time |
| X-Large Tip | $3.99 | one-time |
| XX-Large Tip | $4.99 | one-time |


## Frequently asked questions

### Is 1 / f Clock free?

1 / f Clock is free to download, with in-app purchases available.

### Is BitTime free?

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

### Do 1 / f Clock or BitTime have ads?

Neither 1 / f Clock nor BitTime shows ads.

### Which is updated more often, 1 / f Clock or BitTime?

1 / f Clock ships an update every 7 months, and BitTime monthly. Most recently, 1 / f Clock was updated on October 7, 2026 and BitTime on October 1, 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.*