# Go Library vs Days Mark

The clearest difference is update cadence: Days Mark at daily against Go Library's fortnightly. 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.

Go Library ships an update fortnightly, Days Mark daily. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Go Library | Days Mark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Size | 92 MB | 30 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gayatri Software Services Pvt Ltd](https://appshunter.io/developer/1508855122) | [Ultrex](https://appshunter.io/developer/1872622268) |

## What reviewers say

### Go Library

[App page](https://appshunter.io/ios/app/go-library/id6480274567)

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

**In-app purchases:** none


### Days Mark

[App page](https://appshunter.io/ios/app/days-mark-countdown/id6758380098)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Go Library free?

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

### Is Days Mark free?

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

### Do Go Library or Days Mark have ads?

Neither Go Library nor Days Mark shows ads.

### Which is updated more often, Go Library or Days Mark?

Go Library ships an update fortnightly, and Days Mark daily. Most recently, Go Library was updated on October 20, 2026 and Days Mark on October 12, 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.*