
Candling is a technique used to observe the development of an egg. Traditionally, a bright light source is placed behind an egg in a dark room to illuminate its interior. However, with modern technology, candling can now be done using your iPhone and a simple app. This article will explore the process of candling eggs with an iPhone, providing a step-by-step guide to help you hatch your own chicks successfully.
Candling eggs with an iPhone
| Characteristics | Values |
|---|---|
| App | iTorch |
| Light intensity | Bright enough for white eggs |
| Ease of use | Simple and cheap |
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What You'll Learn

Using the iTorch app for egg candling
The iTorch app is a convenient tool that can be used for egg candling, a process that involves examining eggs to assess their quality and fertility. Here's a step-by-step guide on how to use the iTorch app for this purpose:
Downloading and Setting Up iTorch:
Begin by downloading the iTorch app on your iPhone from the App Store. Once installed, open the app and familiarize yourself with its interface. The app is designed to control the LED light on your iPhone, allowing you to use it as a makeshift torch.
Adjusting Brightness and Settings:
Before using iTorch for egg candling, ensure the brightness is adjusted to a high setting. This can usually be done within the app or through your iPhone's settings. The higher the brightness, the better the candling results, especially when dealing with darker or brown eggs.
Preparing the Eggs:
Collect the eggs you intend to candle and ensure they are clean and free of debris. Egg candling is most effective on days 7-10 of incubation, but can also be done earlier. Place the eggs in a dark room or container to enhance the visibility of their contents when using the iTorch.
Performing Egg Candling:
Open the iTorch app and direct the LED light shining from the back of your iPhone toward the egg you wish to candle. Hold the phone close to the egg, but not touching it, and observe the egg's contents. Look for signs of fertility, such as the presence of veins or an embryo, which indicate a healthy, developing chick.
Interpreting Results:
Fertile eggs will display a visible network of veins and may show an embryo, which appears as a dark spot or ring. Infertile eggs will appear mostly clear, with no distinct signs of veins or an embryo. With practice, you'll be able to interpret the results more effectively.
ITorch offers a simple and innovative solution for egg candling, allowing farmers and hobbyists to assess the fertility of their eggs without the need for specialized equipment. This method can be particularly useful for small-scale operations or when quick inspections are necessary.
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The brightness of the LED light
The brightness of the light is a crucial factor in successfully candling eggs. The purpose of candling is to illuminate the contents of an egg to determine whether it is fertile or not, and to check if the embryo is developing properly. Therefore, the brighter the light, the better.
While a standard iPhone flashlight can be used for candling, its brightness may not be sufficient for darker-shelled eggs. In such cases, a high-powered LED flashlight or a purpose-built egg candler may be required. These options offer increased brightness and can improve visibility when candling darker eggs.
It is worth noting that some high-powered flashlights can generate significant heat at higher light settings, which may pose a risk of cooking the eggs. To mitigate this issue, it is recommended to use a cardboard tube or a similar barrier to increase the distance between the light and the egg, reducing the heat transfer while still allowing the light to pass through.
When candling eggs, it is generally advised to conduct the process in a dark room or closet to optimise the visibility within the egg. By minimising external light sources, the bright light used for candling can more effectively illuminate the contents of the egg, facilitating a clearer observation of the embryo's development.
While a brighter light is advantageous, it is important to consider the comfort and safety of the eggs during the candling process. Excessive brightness or heat can potentially harm the eggs, so finding a balance between brightness and safety is crucial. Additionally, ensuring that the eggs are securely held during candling can help prevent accidental damage or dropping.
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Testing the method on white eggs
To test this method on white eggs, you can download an app called iTorch, which makes a bright LED light shine out of the small window at the back of your iPhone. This light is bright enough to work well with white eggs. Ensure that your iPhone is stable and secure, then hold a white egg between the camera and the light, allowing the light to shine through the egg.
This method of egg candling with an iPhone can help determine the fertility of the egg. A clear egg is likely empty, while a cloudy egg may be starting to develop an embryo. If you see a dark spot with veins coming out of it, the egg is likely fertile.
To get a better view, try turning off the lights in the room and covering one eye with your hand to reduce glare. You can also try adjusting the brightness and colour temperature settings on your iPhone to see if that improves your ability to detect details within the egg.
This method of egg candling with an iPhone is a simple, inexpensive way to test the fertility of white eggs. It is a useful tool for those who want to try candling at home without purchasing specialised equipment. However, it is important to note that the accuracy of this method may vary depending on factors such as the quality of the iPhone camera and screen, as well as the ambient lighting conditions.
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Testing the method on brown eggs
While the iTorch app is confirmed to be bright enough to candle white eggs, its effectiveness on brown eggs is not guaranteed. To test the method on brown eggs, follow these steps:
- Download the iTorch app on your iPhone. This app makes a bright LED light shine out of the tiny back window of the phone, which can be used for candling eggs.
- Ensure that your iPhone is charged and the iTorch app is turned on, emitting light.
- Prepare the brown eggs you intend to candle by cleaning their shells gently. This step is crucial as dirty egg shells can obstruct your view during candling.
- Place the brown eggs in a dark room to allow for better concentration and observation during the candling process. A closet or a room with drawn curtains can be ideal.
- Begin with one egg at a time. Hold your iPhone with the iTorch light shining directly at the egg, about an inch or two away from its shell.
- Carefully observe the interior of the egg through the shell. For brown eggs, you may need to adjust the distance between the phone and the egg, moving them closer together or further apart, to find the optimal viewing distance.
- Look for signs of fertility and embryo development, such as veins, movement, or an embryo shape. The candling process may be more challenging with brown eggs due to their darker shell colour, but with patience and the right angle, you may still be able to observe these indicators.
- Repeat the process for each brown egg you wish to candle, taking notes on your observations for each egg.
- Finally, compare your candling results with other methods, if possible, to validate the accuracy of the iPhone candling technique on brown eggs. This could involve candling the same eggs using a traditional candle or specialized egg candler.
By following these steps and comparing results, you can assess the effectiveness of using an iPhone and the iTorch app for candling brown eggs. The success of this method will depend on various factors, including the intensity of your iPhone's LED light, the thickness and colour of the egg shells, and the ambient light conditions during candling.
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Testing the method on green eggs
To test the iPhone candling method on green eggs, you can download an app called iTorch, which makes a bright LED light shine out of the small window at the back of your phone. This app is reported to work well with white eggs, but results with brown or green eggs are not mentioned.
To begin testing, gather a collection of green eggs and your iPhone with the iTorch app installed. Ensure the room is dark, as this will provide the best results for candling. Hold one of the green eggs in your hand and position the iPhone's LED light close to the shell, shining the light through the egg.
The light should penetrate the egg, allowing you to see inside and observe the contents. Look for signs of embryonic development, such as veins, an embryo, or movement. If you observe any of these indicators, it suggests that the egg is fertile and developing.
Repeat this process for each green egg in your collection. It is important to note that candling does not provide a definitive assessment of an egg's fertility, as it is possible for an egg to appear clear during candling but still be developing. Additionally, an egg that shows signs of development may still fail to hatch due to various factors.
Through this methodical testing process, you can evaluate the effectiveness of the iPhone candling method on green eggs and determine the visibility and accuracy of embryo detection compared to white eggs.
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Frequently asked questions
Candling is a process used to observe the development of an egg.
You can download an app such as ITorch that makes a bright LED light shine out of the back of your iPhone. This light is bright enough to observe the development of white eggs.
Yes, there are other ways to candle eggs. Some people use a cell phone, while others use a droid.
Candling eggs can be used to observe the development of an egg and to determine whether or not it is fertilized.











































