# Mermaid Secrets9–Hidden Crimes — Investigate the crime

> Mermaid princess detective game with a high school mystery and romance plot. (iPhone/iPad app by JoyPlus Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/mermaid-secrets9hidden-crimes/id1353250376 (this page in markdown: same URL + `.md`)
- Developer: [JoyPlus Technology Co., Ltd.](https://appshunter.io/developer/1280183329)
- Category: Games, Entertainment
- Price: Free
- Rating: 4.62/5 from 141 App Store ratings · 6 written reviews indexed
- Age rating: 9+
- Requires: iOS 8.0 · 139 MB
- Languages: English
- Released: 2018-03-13
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/mermaid-secrets9hidden-crimes/id1353250376/reviews.md

## What is Mermaid Secrets9?

Mermaid Secrets High School Love Story! Mermaid Princess Games for Girls! 
Be a super agent and conduct a comprehensive investigation of the case. Many useful clues have been found and it's time for you come out with the whole truth. All the evidence proves that he is the criminal. Collect all evidence and bring the bad guys to justice. It's time to arrest him. Let's go!

Features:
1. OMG. Alan is coming here. He sneaked up on Eric and tried to destroy the evidence. Can he be any worse? 
2. Was high school boy Eric injured in the fight? Give Him a head-to-toe health check.
3. Be a super agent and conduct a comprehensive investigation of the case.
4.Great. Many useful clues have been found. Mermaid Princess Mia scratched  the kidnapper's arm when she struggled with him. Do the blood test to find the truth. 
5. Collect all evidence and bring the bad guys to justice.
6. All the evidence proves that he is the criminal. It's time to arrest him. Let's go!
7. The bad days are over. The mystery kidnapper had been arrested and princess mermaid Mia can breathe again.
8. Good News. Your crush high school boy Eric asks you to hang out. Will he confess his feeling to you? So Excited about it!
9. Oh, no. The gossip girl Lily has just eavesdropped two sweethearts. She couldn't wait to share the gossip with her good friend Kim. 
10. Kim is just spoiled and arrogant. How can she accept a boy she likes to date with other girl?

The Mystery Mermaid Love Story in high school ever! Download Free Now! 

ABOUT US 
JoyPlus creates fresh mobile content for the whole family. we lovingly produce digital adventures that entertain, challenge, and engage families all over the world. Find us on Apple's iOS and Google's Andriod operation system! 
Visit us: http://www.joyplustech.net/ 
Watch us:  https://www.youtube.com/c/JoyPlusGames

CONTACT US 
Let us know what you think! Questions? Suggestions? Technical Support? Contact us 24/7 at contact@joyplustech.com.

## Key features

- Investigate crime scenes
- Collect evidence
- Perform health checks
- Conduct blood tests
- Arrest criminals
- High school romance elements
- Uncover secrets

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/mermaid-secrets9hidden-crimes/id1353250376/reviews.md

### 5/5 — Cute n cool

*2020-06-26, version 1.0*

I tots ❤️🧡💛💚💙💜 these games. Thanks 🙏

### 5/5 — Wow!!

*2018-09-25, version 1.0*

Its so interesting and im 18!!!

### 5/5 — Please do more

*2018-03-30, version 1.0*

Eve since I started playing this game I just loved it please do more!!!!

### 5/5 — Good app

*2018-03-28, version 1.0*

Good review keep it up

### 5/5 — Mermaid 10 Please

*2018-03-20, version 1.0*

I really want number 10mermaid secret please everything is awesome it is the best game I ever played in my life

### 4/5 — Mermaid secret

*2018-03-18, version 1.0*

I want number 10 to be when Erica asked Mia to be her girl friend and Mia gets her neakles back and the mean girl stops getting in the way of Erica and Mia.

## Frequently asked questions about Mermaid Secrets9

### What is the gameplay like in Mermaid Secrets9?

Mermaid Secrets9 involves investigating a crime by collecting clues, performing health checks on characters, and conducting forensic tests like blood analysis to identify the culprit. The game also includes narrative elements of high school romance and social drama.

### Is Mermaid Secrets9 suitable for younger children?

The app has an age rating of 9+, indicating it is suitable for children aged nine and older. The themes involve mystery and investigation, with a focus on a high school setting.

### Can I play Mermaid Secrets9 offline?

The provided data does not specify whether Mermaid Secrets9 supports offline play. Typically, games with narrative elements and potential online features may require an internet connection.

### How often is Mermaid Secrets9 updated?

Mermaid Secrets9 was last updated on March 13, 2018, with version 1.0. This suggests the game has not received updates in a significant period.

### What devices can I play Mermaid Secrets9 on?

Mermaid Secrets9 is available on iPhone, iPad, and iPod devices. It is developed by JoyPlus Technology Co., Ltd. and is compatible with iOS.

### What is the user sentiment for Mermaid Secrets9?

Mermaid Secrets9 has a high rating of 4.6 stars from 141 ratings, indicating generally positive user sentiment. Users likely appreciate the mystery and story aspects of the game.

### Does Mermaid Secrets9 have in-app purchases or ads?

The app is listed as free and does not have in-app purchases. Information regarding ads was not provided in the data, but free games often include advertisements.

### What is the main goal in Mermaid Secrets9?

The main goal in Mermaid Secrets9 is to act as a super agent and mermaid princess to investigate a crime, gather all evidence, and bring the criminals to justice. The game also features romantic subplots.

## Version history (last 1 release)

### 1.0 — 2018-03-13

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by JoyPlus Technology Co., Ltd.

- [Mermaid Secrets1-First Rescue](https://appshunter.io/ios/app/mermaid-secrets1-first-rescue/id1280183330)
- [Mermaid Secrets2- Love Story](https://appshunter.io/ios/app/mermaid-secrets2-love-story/id1298451034)
- [Mermaid Secrets3-School Drama](https://appshunter.io/ios/app/mermaid-secrets3-school-drama/id1314352975)
- [Mermaid Secrets4-Sea Crash](https://appshunter.io/ios/app/mermaid-secrets4-sea-crash/id1314835255)
- [Mermaid Secrets5 - Sea Rescue](https://appshunter.io/ios/app/mermaid-secrets5-sea-rescue/id1323456562)
- [Mermaid Secrets7- Save Mermaid](https://appshunter.io/ios/app/mermaid-secrets7-save-mermaid/id1335508748)

All apps by JoyPlus Technology Co., Ltd.: https://appshunter.io/developer/1280183329

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*