# Sea Shell Identifier vs Twilock

The clearest difference is ads: Twilock at none against Sea Shell Identifier's shown. Sea Shell Identifier's advantage is iOS requirement (12.0 vs 16.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Sea Shell Identifier sells 2 in-app purchases, starting at $7.99 per 7 days and Twilock sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 4, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Sea Shell Identifier | Twilock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (25 ratings)](https://appshunter.io/ios/app/twilock-screen-time-control/id6786474238/reviews)** |
| Number of ratings | — | **25** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | Weekly |
| Monetization | — | Freemium |
| Size | 101 MB | 69 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aasif Mansuri](https://appshunter.io/developer/1773766625) | [Prism Studios](https://appshunter.io/developer/6786474240) |

## What reviewers say

### Sea Shell Identifier

[App page](https://appshunter.io/ios/app/sea-shell-identifier-shelify/id6749952643)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shellify Scan One Week | $7.99 | per 7 days |
| Shellify Scan One year | $44.99 | per year |


### Twilock

[App page](https://appshunter.io/ios/app/twilock-screen-time-control/id6786474238)

This app helps you reclaim your nights and mornings by blocking distracting apps during specific, customizable windows. Build streaks, earn badges, and track your reclaimed time privately. Connect with friends for accountability.

**Highlights:** Customizable app blocking windows, Streak building and rewards, Reclaimed time tracking, Friend accountability leaderboard, Private data handling, Optional Pro features

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Twilock Pro Monthly | $4.99 | per month |
| Twilock Pro Annual | $39.99 | per year |
| Twilock Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Sea Shell Identifier free?

Sea Shell Identifier is free to download, with in-app purchases available.

### Is Twilock free?

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

### Do Sea Shell Identifier or Twilock have ads?

Sea Shell Identifier shows ads; Twilock does not.

### Which is updated more often, Sea Shell Identifier or Twilock?

Sea Shell Identifier ships an update weekly, and Twilock weekly. Most recently, Sea Shell Identifier was updated on October 4, 2026 and Twilock on October 19, 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.*