# TBR Book Jar vs KRIZ

The clearest difference is update cadence: TBR Book Jar at every 4 days against KRIZ's every 3 weeks. KRIZ's advantage is iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. TBR Book Jar sells 4 in-app purchases, starting at $3.99 per month and KRIZ sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

TBR Book Jar ships an update every 4 days, KRIZ every 3 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TBR Book Jar | KRIZ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/tbr-book-jar-reading-tracker/id6761447804/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 118 MB | 46 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Christopher Mayberry](https://appshunter.io/developer/1390482166) | [Kateryna Dimitrashko](https://appshunter.io/developer/6797778450) |

## What reviewers say

### TBR Book Jar

[App page](https://appshunter.io/ios/app/tbr-book-jar-reading-tracker/id6761447804)

This app helps you decide what to read next with over 190 prompts and a customizable digital bookshelf. Track your reading progress, view stats, and personalize your virtual library.

**Highlights:** 190+ reading prompts, Customizable digital bookshelf, Page progress tracking, Reading timer and speed tracking, Reading stats and goals, Goodreads import, Dark mode support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly (One-Time Offer) | $3.99 | per month |
| TBR Book Jar Pro Monthly | $4.99 | per month |
| TBR Book Jar Pro Annual | $29.99 | per year |
| TBR Book Jar Pro Lifetime | $69.99 | one-time |


### KRIZ

[App page](https://appshunter.io/ios/app/kriz-reading-diary/id6797778448)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KRIZ Full | $1.99 | per month |
| KRIZ Full | $17.99 | per year |


## Frequently asked questions

### Is TBR Book Jar free?

TBR Book Jar is free to download, with in-app purchases available.

### Is KRIZ free?

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

### Do TBR Book Jar or KRIZ have ads?

Neither TBR Book Jar nor KRIZ shows ads.

### Which is updated more often, TBR Book Jar or KRIZ?

TBR Book Jar ships an update every 4 days, and KRIZ every 3 weeks. Most recently, TBR Book Jar was updated on October 28, 2026 and KRIZ 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.*