# TKDCD vs Logbook

The clearest difference is update cadence: TKDCD at every 2 days against Logbook's every 10 months. TKDCD also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TKDCD ships an update every 2 days, Logbook every 10 months. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | TKDCD | Logbook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 10 months |
| Size | 86 MB | 22 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Serenas Uluslararasi Turizm Kongre Organizasyon A.S.](https://appshunter.io/developer/698708194) | [HEARTSAPIENS MEDIKAL TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1794745195) |

## What reviewers say

### TKDCD

[App page](https://appshunter.io/ios/app/tkdcd/id1642948164)

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

**In-app purchases:** none


### Logbook

[App page](https://appshunter.io/ios/app/logbook-heartsapiens/id6742779060)

**In-app purchases:** none


## Frequently asked questions

### Is TKDCD free?

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

### Is Logbook free?

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

### Do TKDCD or Logbook have ads?

Neither TKDCD nor Logbook shows ads.

### Which is updated more often, TKDCD or Logbook?

TKDCD ships an update every 2 days, and Logbook every 10 months. Most recently, TKDCD was updated on October 8, 2026 and Logbook on October 15, 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.*