# Cave DB vs Time to Surface

The clearest difference is rating: Time to Surface at 5.0 against Cave DB's 2.5. Cave DB's advantage is in-app purchases (none vs 3) and device support (3 vs 1). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Time to Surface sells 3 in-app purchases, starting at $2.99 per month. Cave DB asks for nothing beyond the download.

Time to Surface holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Cave DB | Time to Surface |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/cave-db/id6478911599/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/time-to-surface-deco-planner/id6803187271/reviews)** |
| Number of ratings | **2** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | Free | Free |
| Size | 3 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sam Educational](https://appshunter.io/developer/496387512) | [RUSTAM ISMAILOV](https://appshunter.io/developer/6799582362) |

## What reviewers say

### Cave DB

[App page](https://appshunter.io/ios/app/cave-db/id6478911599)

A community-driven database for caving and cave diving sites globally. Users can explore, research, and add new locations, complete with photos and videos.

**Highlights:** Global cave and caving site database, Community-contributed content, Photos and videos of sites, User exploration and research tools, Easy-to-use application interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Time to Surface

[App page](https://appshunter.io/ios/app/time-to-surface-deco-planner/id6803187271)

This technical dive planner calculates staged decompression for dives up to 56 meters. It supports multiple bottom gases and one deco bottle, offering detailed gas planning, runtime tracking, and contingency solutions. The app also accounts for repetitive dives and provides a printable wetnote layout.

**Highlights:** Staged decompression planning (15-56m), Support for six bottom gases and one deco gas, Twin cylinder configuration, Bühlmann ZH-L16C model with adjustable gradient factors, Adjustable ppO2 and descent rates, Repetitive dive planning, Contingency scenario calculations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diver.Today, monthly | $2.99 | per month |
| Diver.Today, yearly | $19.99 | per year |
| Diver.Today, for life | $49.99 | one-time |


## Frequently asked questions

### Is Cave DB free?

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

### Is Time to Surface free?

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

### Which has better reviews, Cave DB or Time to Surface?

Time to Surface is rated higher. Cave DB averages 2.5 out of 5 from 2 ratings, while Time to Surface averages 5.0 from 1 ratings.

### Do Cave DB or Time to Surface have ads?

Neither Cave DB nor Time to Surface shows ads.

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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.*