A smart wristband to prevent children from going missing.

What is it?

Lineable is a wearable smartband for kids which works with the Lineable Application to protect children from going missing using Bluetooth 4.0 beacon technology. Parents will be able to monitor the location of their children via smartphone and can request the help of other Lineable App users within the proximity of their child if their child gets lost.

The name Lineable is created combining the two words, ‘Line’ and ‘Able.’ Our aim is to create a powerful connection among people and the society to pursue the universal value of protecting our precious children.

[Main Features]
1. Cost Effective
We have left no margin for profit so that it can be affordable to all children across the world without discrimination. The Lineable smartband is sold at its manufacturing price with the Lineable App offered for free.

2. Durable
Lineable is 100% water and dust proof. It has a certified Ingress Protection (IP) rating of IP 7 (Waterproof) /IP6 (Dust proof). *IP 7 (Waterproof-immersion between 15cm-1m) / IP 6 (Dust- no ingress / highest rating)

3. Low-Power
Using Bluetooth Low Energy (BLE), Lineable’s battery lasts for a full year without the need to recharge it.

4. Harmless
Lineable is made of silicone that is harmless to children. Considering that the users are children, Lineable is harmless to children for potential biting, chewing, licking, and other curiosities.

5. Scalable
With the super affordable price and simple action of downloading the Lineable application, Lineable can be applied anywhere and anytime regardless of varying environments and communities.

In addition, not only the smartband users, but also any third party with good-will can contribute in protecting the children. By simply downloading the app, they can help parents find their children when requested on the Lineable App. Every user can become a helping hand in creating a safer world for children. Lineable will create a powerful connection and larger community beyond the borders to protect our children together.

How is it used?

The Lineable smartband is provided in the form of a silicone bracelet for children to wear on their wrists (light weight 15g). When a child wears the Lineable smartband, parents can monitor their child via smartphone with the Lineable App. (For detailed functions, please refer to the “How does it work?” section below.)

What technologies does it incorporate?

Lineable uses Bluetooth 4.0 beacon and crowdsourcing GPS technology.

Each Lineable smartband sends out a unique UUID signal every second via Bluetooth and the signals are detected by smartphones with Lineable Apps

The Lineable smartband itself does not have embedded GPS function, but uses the resources of nearby smartphone users to track child’s location, forming crowdsourcing GPS.
Smartphones with Lineable App within the proximity of a Lineable band can detect the Bluetooth signal of the smartband, creating location data and sending the data to the server and to the parents.

How does it work?

Lineable is the combination of a smartband and a software application working together to protect children from going missing. The Lineable smartband sends out a unique UUID signal every second via Bluetooth. The signals are detected by parents’ smartphones with the Lineable App.

[Main features of Lineable Application]
1. Alert
To prevent children from going missing, the Lineable application sends parents an alert when their child wanders out of the effective Bluetooth range (approximately 20-30m).

2. Tracking
Lineable uses crowd sourcing GPS to locate children. Smartphones with the Lineable application can detect nearby Lineable smart bands and send the location to parents. The more people using the Lineable app, the more precise the tracking becomes, creating a safer world for children.

3. Help Request
If a child gets lost, parents can report their child missing and ask for help. Lineable app users nearby the child will receive vital information of the child to identify him/her quickly and help parents locate their child. Once the users find the child, they will be able to communicate with his/her parents using the contact information provided on the app.

Who uses it?

The Device User
The Wearer : Children approximately 3-12 yrs. Suitable for young children who do not use phones, have not memorized parents’ contact information, or too young to find their way back home.

The Service User can be divided into three categories
Primary Protectors : Consists of parents, siblings, uncle, relatives and all other family members that are directly linked to the child. They have access to location data, and can report the child as missing. They are the ones who will receive calls when their child is found.

Secondary Protectors: Consists of school teachers, bus drivers, babysitters, and other caregivers that directly interact with the child. They are positioned among the child’s daily routine and by using the Lineable app they are able to scan the child’s data and notify the parents that they are on safe hands

Tertiary Protectors: Voluntary Lineable app users who install the app and become a safe perimeter. They are Lineable app users who have no relationship with the child, but can be a gateway to help parents find their children by sending the location of the child. They can be parents of other children, government officials, officers of the law, staff of public areas or NGO workers. Simply, they are any users of the application who wish to create safe perimeters for children. (ex. malls, theme parks, transportation company etc.)

Why does it help?

Children missing is a big issue all around the world. Statistically, at least 8 million children go missing each year. Families seek their return, yet, most countries lack systems to assist them and most countries do not even count the missing. Lineable will be able to support countries to create a system for solving missing children issues.

Lineable can be a solution for it can serve as a prevention method by not letting children stray too far in the first place, improving awareness among the community, and ultimately, establishing a new systematic approach that engages immediate off-line action to find missing children.

1. Prevention
In many cases, children go missing in the blink of an eye. You never know when they will wander away without being noticed. By alerting parents and protectors when their children wander away, Lineable will prevent the children from going missing in the first place.

2. Raise Awareness (Encourage collaboration)
Lineable can increase awareness of missing children and spread to create a safer environment for children. By simply downloading the app, users will contribute in protecting children which would urge voluntary involvement among communities whether they are a parent or not. Lineable users will encourage others to download Lineable app to protect children together. The awareness of child protection will be emphasized and the support individuals can give by just downloading the app will strengthen a community, leading to greater support among the masses in dealing with issues of missing children.

3. Systematic Approach
Thousands of children are missing across the world, yet many countries lack systems to deal with the problem. Lineable’s ‘Help Request’ function will support a systematic approach engaging immediate off-line action giving access to the world’s largest search and rescue team – members of society.
By giving parents and protectors the power to alert other Lineable users within the proximity of their missing child in seconds, it will create the world’s largest network of an instant search and rescue party that reinforces safety. If we can engage with relevant organizations such as government officials, officers of the law (police), child safety NGOs, childcare facilities, educational institutions, foster homes, etc., the network will become much more powerful.


Team's Location

South Korea

Team's Occupation


Team Members

Lineable, Inc.

Focus Area(s)

Alert/Response, Data Collection/Data Insight

UNICEF Pillar(s)

Child Protection

These pages have been pulled directly from applications submitted to the Wearables for Good Challenge in 2015. They represent the work of the individual teams and have subsequently not been edited.


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