# Bottle Cap Index vs DaoChai

The clearest difference is rating: DaoChai at 4.8 against Bottle Cap Index's 3.0. DaoChai also leads on in-app purchases (none vs 1) and update cadence (every 11 days vs every 13 months). Bottle Cap Index's advantage is iOS requirement (8.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Bottle Cap Index sells 1 one-off in-app purchase. DaoChai asks for nothing beyond the download.

DaoChai holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: DaoChai has 21 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 67% of Bottle Cap Index's written reviews are positive against 95% of DaoChai's.

Bottle Cap Index ships an update every 13 months, DaoChai every 11 days. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Bottle Cap Index | DaoChai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/bottle-cap-index/id1089533114/reviews) | **[4.8 (21 ratings)](https://appshunter.io/ios/app/daochai/id1612804466/reviews)** |
| Number of ratings | 2 | **21** |
| Positive reviews | 66.7% of reviews | **95.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 11 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2 MB | 82 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Dmitry Dalimov](https://appshunter.io/developer/1089533113) | [eCom Labs](https://appshunter.io/developer/1606355691) |

## What reviewers say

### Bottle Cap Index

[App page](https://appshunter.io/ios/app/bottle-cap-index/id1089533114)

This app helps collectors catalog and search for bottle caps using a comprehensive database. You can filter results by various criteria and save cap information for offline access.

**Highlights:** Search bottle caps by name, producer, or drink type, Filter results by country, image availability, and factory signs, Save cap information and images for offline browsing, Access the bottlecaps.de database, Catalog crown caps

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Favorites feature | $0.99 | one-time |


### DaoChai

[App page](https://appshunter.io/ios/app/daochai/id1612804466)

This app brings a curated selection of authentic Chinese teas and tea culture to your smartphone. Explore a wide range of fresh teas, manage your orders, and discover unique tasting tools. Stay updated with new arrivals through personalized notifications.

**Highlights:** Unified personal account with online store, Tea tasting assessment tools, Personalized new arrival notifications, Browse assortment by store location, Order history and loyalty points, Email and phone authorization

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

**In-app purchases:** none


## Frequently asked questions

### Is Bottle Cap Index free?

Bottle Cap Index is free to download, with in-app purchases available.

### Is DaoChai free?

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

### Which has better reviews, Bottle Cap Index or DaoChai?

DaoChai is rated higher. Bottle Cap Index averages 3.0 out of 5 from 2 ratings, while DaoChai averages 4.8 from 21 ratings.

### Do Bottle Cap Index or DaoChai have ads?

Neither Bottle Cap Index nor DaoChai shows ads.

### Which is updated more often, Bottle Cap Index or DaoChai?

Bottle Cap Index ships an update every 13 months, and DaoChai every 11 days. Most recently, Bottle Cap Index was updated on October 26, 2026 and DaoChai on October 27, 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.*