# CDB Calendar vs SL Days

The clearest difference is ads: CDB Calendar at none against SL Days's shown. CDB Calendar also leads on update cadence (weekly vs monthly) and iOS requirement (12.4 vs 16.6). On price, 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.

CDB Calendar ships an update weekly, SL Days monthly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | CDB Calendar | SL Days |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Monthly |
| Size | 25 MB | 4 MB |
| Requires iOS | **12.4** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Citizens Development Business Finance PLC](https://appshunter.io/developer/1163972174) | [Chaleepa Mallawa](https://appshunter.io/developer/1359729160) |

## What reviewers say

### CDB Calendar

[App page](https://appshunter.io/ios/app/cdb-calendar/id6475034776)

**Features:** macOS Compatibility

**In-app purchases:** none


### SL Days

[App page](https://appshunter.io/ios/app/sl-days/id6757432786)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CDB Calendar free?

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

### Is SL Days free?

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

### Do CDB Calendar or SL Days have ads?

SL Days shows ads; CDB Calendar does not.

### Which is updated more often, CDB Calendar or SL Days?

CDB Calendar ships an update weekly, and SL Days monthly. Most recently, CDB Calendar was updated on November 4, 2026 and SL Days on November 5, 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.*