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iMessage vs SMS: A Complete Comparison Guide

Elsa Updated on May 16, 2025 Filed to: Parent Control

Texting is one of the simplest methods of communication in our daily lives. However, not all messages are created the same. If you are using an iPhone or Mac device, you surely understand that some messages are displayed in blue bubbles, while others are shown in green. This color difference indicates what type of message is being sent, either an iMessage or SMS.

In this article, we will cover in detail iMessage vs SMS, how they function, and what differentiates them. Also, we’ll highlight the best summary for using each messaging service separately.

  • Part 1: What is iMessage?
  • Part 2: What is SMS?
  • Part 3: iMessage vs SMS: Key Differences
  • Part 4: Pros and Cons of iMessage and SMS
  • Part 5: When to Use iMessage or SMS
  • Part 6: Why Families Need More Than iMessage or SMS
  • Part 7: How to Disable iMessage on iPhone

Part 1. What is iMessage?

iMessage is Apple’s texting service that works over the internet instead of regular cell networks." It is only available on iPhones, iPads, and Macs. To send an iMessage, you must be connected to Wi-Fi or mobile data.

When both you and the recipient are using iMessage, your messages will show up in blue iMessage bubbles. If the other user has an Android phone or turns off iMessage, your iMessage will automatically switch to a standard text message shown in green.

green bubble color on iMessage

Key features of iMessage

  • Only works on Apple devices (iPhone, iPad, Mac)
  • Needs internet (Wi-Fi or mobile data)
  • Sends photos, videos, files, voice notes, and text
  • Shows blue message bubbles
  • Read receipts and typing indicators
  • End-to-end encryption
  • Syncs across Apple devices
Note : If the iPhone has no internet connection or the other person has an Android device, iMessage features will be disabled, and texts will be sent as standard SMS.

Part 2. What is SMS?

SMS (Short Message Service) is an older text messaging protocol that works on every mobile device. It does not require an internet connection and sends messages through cellular networks. Because almost every mobile supports SMS, it is a global communication method.

As opposed to iMessage, SMS has a 160-character limit. If you use emojis or special symbols, your message might get broken up and sent in pieces. For photos and videos, MMS (Multimedia Messaging Service) is required, though it has strict limitations as well.

what is sms

Key Features SMS

  • Works on all mobile phones
  • Doesn’t need internet
  • Limited to 160 characters
  • Sends basic texts (media requires MMS)
  • No read receipts or typing indicators
  • No encryption

Part 3. iMessage vs SMS: Key Differences

If you’ve ever wondered what is the difference between SMS and iMessage, the differences are primarily features, security, and internet use.

FeaturesiMessageSMS
CompatibilityApple devices onlyAll mobile devices
Internet RequiredYesNo
Message Bubble ColorBlueGreen
Media SharingHigh-quality photos, videos, filesLimited (via MMS)
Read ReceiptsYesNo
Typing IndicatorsYesNo
EncryptionEnd-to-endNone
Character LimitUnlimited160 characters
Cross-Device SyncYesNo
CostUses data (free on Wi-Fi)Cost per message

Part 4. Pros and Cons of iMessage and SMS

FeaturesiMessage ProsiMessage ConsSMS ProsSMS Cons
CompatibilityGreat for Apple usersOnly works on AppleWorks on all phonesLacks modern features
MediaSends large files, good qualityNeeds internetWorks without internetFile size limits
PrivacyFully encryptedNot available on AndroidSimple, easyNot encrypted
FeaturesRead receipts, typing indicatorsNot universalGood for emergenciesNo advanced features
CostFree over Wi-FiData charges may applyIncluded in most plansCarrier fees may apply

Part 5. When to Use iMessage or SMS

Imagine you’re talking with a friend; everything seems fine with blue bubbles. The next message you send shows up as green. What happened? They could have turned off iMessage, lost connection, or switched to using an Android. It perfectly explains the iPhone green text vs blue text phenomenon, blue means iMessage is on, and green indicates the system reverted to SMS messaging.

When to use iMessage:

  • You wish to chat with someone who uses an Apple device.
  • To avoid international SMS charges.
  • When it comes to sharing large videos and photos.
  • Appreciate read receipts and syncing across devices.
  • Need privacy and wish to keep interactions encrypted.

When to use SMS:

  • The contact you are texting uses an Android device.
  • You have no access to the internet.
  • Want a one-size-fits-all solution that works everywhere.
  • It’s an emergency, and quick delivery matters

Part 6. Why Families Need More Than iMessage or SMS

iMessage provides secure, encrypted messaging, and SMS has a wider reach; however, both services lack the control features parents need to protect their children. These applications don’t include the ability to track, filter, or control message interactions and screen time.

AirDroid Parental Control is a contemporary solution for families seeking the balance between connectivity and safety.

Family Chat: Safe and Private Communication

Parents can invite trusted participants to a private family group which they can monitor and control. This group has the capability to send text and voice messages, share files, send photos and videos, and even make calls—all in a secure environment. Family Chat allows parents to control who joins the conversation and even remove children from the chat when necessary.

Monitor Calls & SMS: Protecting Communication

With AirDroid, parents can keep track of calls and SMS on their child’s Android phone. You can set up call whitelists and blacklists that somehow prevent spam and unwanted calls. To make things better, you will receive real-time notifications of flagged sms texts containing sensitive words to assist you in detecting possible bullying or threats and unsafe interactions.

Why It Matters

Neither blue iMessage bubbles nor the green SMS texts come with such safety features. That is why apps like AirDroid are so important – they allow parents to ensure that while they keep an eye on their children, the kids cannot be exposed to strangers, spam calls, harmful content, and other potential dangers. This is indeed the additional layer of protection that every family requires in this digital age.

AirDroid Parental Control
Block any unwanted or spam calls, and get instant alerts when suspicious words appear in kids' SMS communication.
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banner airdroid family group chat 768x475

Part 7. How to Disable iMessage on iPhone

If you are switching to an Android phone or experiencing issues with receiving messages, disabling iMessage may help ensure your messages aren’t lost.  To do this, follow these steps:

  1. Step 1. Open the Settings app on your iPhone.
  2. Step 2. Scroll down and tap Messages.
  3. Step 3. Toggle the switch next to iMessage to the off position.
  4. disable imessage on iphone

Once disabled, your messages will be delivered via SMS. If you are searching for how to disable iMessage on iPhone, especially when switching to other devices these steps can be helpful.

Conclusion

Knowing the difference between iMessage and text allows you to make informed decisions about what works best for you. For users of Apple devices who wish to enjoy secure messaging with rich features, iMessage serves well. For ease of use, broad compatibility, and no reliance on internet, SMS is preferable.

For parents, it is wise to look beyond just these two apps. AirDroid Parental Control allows you to supervise your child’s contact list, controlling who they can communicate with, what they can share, and whether any questionable content can show up.

FAQs

Is it better to use iMessage or text?
Elsa
Elsa
In case both you and your contact have Apple devices and the internet is available, iMessage is preferable. It offers rich media sharing, read receipts as well as end-to-end encryption. Moreover, there are no character limits or message costs on Wi-Fi. If you are texting someone with an Android phone or if your internet is unreliable, SMS could serve you better.
Why would iMessage be sent as a text message?
Elsa
Elsa
This occurs when there is no internet connection or if the person you are sending a message to has iMessage disabled. In that case, your iPhone will send the message via standard SMS which changes the iMessage color from blue to green. This conversion allows the message to be sent during the temporary outage of the iMessage service. This is a default system that aids in keeping the communication line open.
Should I turn off iMessage?
Elsa
Elsa
If you’re planning to switch to an Android or another non-Apple phone, or if you’re having issues with message delivery when texting non-Apple contacts, you might have to consider disabling iMessage. Disabling iMessage ensures messages are converted to SMS before sending, preventing any chance of getting stuck. On the other hand, if you’re sticking with Apple products, keeping iMessage on offers richer features along with privacy and security while texting.
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Elsa
Elsa
Elsa has worked on a number of iOS & Android solutions, she can always find her way around almost any application. She is an accomplished, skilled and versatile writer with more than 7 years of technical article writing experience.
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