# Tock Lock vs Swimming Pool Calculator

The clearest difference is price: Tock Lock at Free against Swimming Pool Calculator's $4.99. Tock Lock also leads on in-app purchases (none vs 5) and review sentiment (67% vs 49%). Swimming Pool Calculator's advantage is rating (4.0 vs 3.0) and update cadence (every 2 months vs every 14 months). On ads, device support and iOS requirement there is nothing between them.

Tock Lock is free to download; Swimming Pool Calculator costs $4.99 up front. Swimming Pool Calculator sells 4 in-app purchases, starting at $4.49 per 3 months. Tock Lock asks for nothing beyond the download.

Swimming Pool Calculator holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: Swimming Pool Calculator has 44 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 67% of Tock Lock's written reviews are positive against 49% of Swimming Pool Calculator's, so the app with the better star average is not the one people write more warmly about.

Tock Lock ships an update every 14 months, Swimming Pool Calculator every 2 months. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Tock Lock | Swimming Pool Calculator |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/tock-lock/id1573196472/reviews) | **[4.0 (44 ratings)](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680/reviews)** |
| Number of ratings | 2 | **44** |
| Positive reviews | **66.7% of reviews** | 49.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#194** |
| Size | 324 MB | 116 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Francisco Alejandro Tamayo Ibarra](https://appshunter.io/developer/1546795450) | [Fernando Montero](https://appshunter.io/developer/1591745682) |

## What reviewers say

### Tock Lock

[App page](https://appshunter.io/ios/app/tock-lock/id1573196472)

Control your smart lock using your smartphone. Grant keyless entry to trusted individuals, eliminating the need for physical keys and enhancing convenience for access management.

**Highlights:** Smartphone lock control, Keyless entry, Grant access to others, Convenient access management, Reduces physical key reliance

**Features:** macOS Compatibility

**In-app purchases:** none


### Swimming Pool Calculator

[App page](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680)

**Currently charting:** #194 Top Paid · Utilities (US App Store)

Easily calculate necessary pool chemicals and troubleshoot common water issues like green or cloudy water. This app provides daily and weekly maintenance routines to keep your pool water crystal clear and ready for swimming.

**Highlights:** Chemical calculation, Water issue troubleshooting, Daily maintenance routines, Weekly maintenance routines, Crystal clear water maintenance

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suscripción Premium | $4.49 | per 3 months |
| Suscripción Gold | $6.99 | per 3 months |
| Suscripción Platinum | $7.99 | per month |
| Suscripción Adamantium | $49.99 | per month |


## Frequently asked questions

### Is Tock Lock free?

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

### Is Swimming Pool Calculator free?

Swimming Pool Calculator costs $4.99, and also offers in-app purchases.

### Which has better reviews, Tock Lock or Swimming Pool Calculator?

Swimming Pool Calculator is rated higher. Tock Lock averages 3.0 out of 5 from 2 ratings, while Swimming Pool Calculator averages 4.0 from 44 ratings.

### Do Tock Lock or Swimming Pool Calculator have ads?

Neither Tock Lock nor Swimming Pool Calculator shows ads.

### Which is updated more often, Tock Lock or Swimming Pool Calculator?

Tock Lock ships an update every 14 months, and Swimming Pool Calculator every 2 months. Most recently, Tock Lock was updated on November 3, 2026 and Swimming Pool Calculator on November 11, 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.*