# Old Device Clock & Calendar vs TimeWave

The clearest difference is price: TimeWave at Free against Old Device Clock & Calendar's $5.99. Old Device Clock & Calendar's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.0). On update cadence, ads and device support there is nothing between them.

TimeWave is free to download; Old Device Clock & Calendar costs $5.99 up front. TimeWave sells 2 one-off in-app purchases. Old Device Clock & Calendar asks for nothing beyond the download.

Old Device Clock & Calendar ships an update weekly, TimeWave every 9 days. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Old Device Clock & Calendar | TimeWave |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | — | **[4.2 (46 ratings)](https://appshunter.io/ios/app/timewave-atomic-watch-sync/id6779167516/reviews)** |
| Number of ratings | — | **46** |
| Positive reviews | — | 84.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Paid | **Free** |
| Size | 8 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Taichi Umeki](https://appshunter.io/developer/1896671779) | [毅 何](https://appshunter.io/developer/1477138542) |

## What reviewers say

### Old Device Clock & Calendar

[App page](https://appshunter.io/ios/app/old-device-clock-and-calendar/id6769596420)

Transform an old iPhone or iPad into a dedicated analog clock and monthly calendar display. This app offers a focused, offline experience with customizable appearance and week start day. It's a one-time purchase with no ads, tracking, or subscriptions.

**Highlights:** Analog clock display, Monthly calendar view, Offline functionality, Light and dark appearance, Customizable week start day, No ads or tracking

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

**In-app purchases:** none


### TimeWave

[App page](https://appshunter.io/ios/app/timewave-atomic-watch-sync/id6779167516)

This app simulates radio-controlled clock signals to help your watch synchronize its time when terrestrial signals are unavailable. It offers guides for popular watch brands and checks environmental conditions before transmission.

**Highlights:** Radio-controlled clock signal simulation, Support for multiple international time signals, Environment pre-check and recommendations, Smart output tuning for various audio paths, Local time mode for overseas watches, Watch-specific synchronization guides, Live signal visualization and sync history

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $0.99 | one-time |
| Lifetime Membership | $3.99 | one-time |


## Frequently asked questions

### Is Old Device Clock & Calendar free?

Old Device Clock & Calendar costs $5.99, with no in-app purchases.

### Is TimeWave free?

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

### Do Old Device Clock & Calendar or TimeWave have ads?

Neither Old Device Clock & Calendar nor TimeWave shows ads.

### Which is updated more often, Old Device Clock & Calendar or TimeWave?

Old Device Clock & Calendar ships an update weekly, and TimeWave every 9 days. Most recently, Old Device Clock & Calendar was updated on October 8, 2026 and TimeWave 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.*