Exceeding the usage limit for one or more AWS Free Tier-eligible services

Question

I don't understand. I've just started my business, so I don't have any visitors, I only add new features to my website.
I have two ec2 (for front-end and for backend), rds, s3.
But I already exceeded the usage limit for free tier (12 months) with three services:
```
1. AWS Data Transfer - 1.0 GB are always free per month as part of AWS Free Usage Tier (Global-DataTransfer-Regional-Bytes;
2. Amazon Elastic Compute Cloud - 750.0 Hrs for free for 12 months as part of AWS Free Usage Tier (Global-BoxUsage:freetier.micro);
3. Amazon Simple Storage Service - 2000.0 Requests for free for 12 months as part of AWS Free Usage Tier (Global-Requests-Tier1);
```
How to figure out what's wrong? Or it's normal for was free tier? 
I just thought that I would not be charged for hosting with was free tier until I started to have real users and, as a result, earn money to pay for hosting, but it seems that it is not the case.
Or do I have some wrong settings, and/or usage of AWS services?
What are your thoughts, and suggestions in my case?

Answer

you can follow below link to identify which services are free for 12 months and which are not or always free.

https://aws.amazon.com/free/?all-free-tier.sort-by=item.additionalFields.SortRank&all-free-tier.sort-order=asc&awsf.Free%20Tier%20Types=tier%2312monthsfree&awsf.Free%20Tier%20Categories=*all&all-free-tier.q=ec2&all-free-tier.q_operator=AND

AWS give 750 hours per month for EC2 dependent on region but in case more than one EC2 , hours will be added and if it is more than 750 , their will a charge. .

Free data transfer depends on which service you are using.
Data Transfer from AWS Regions to the Internet is free for up to 100 GB of data per month. This includes Amazon EC2, Amazon S3, Elastic Load Balancing.
Data Transfer from Amazon CloudFront is free for up to 1 TB of data per month, and is no longer limited to the first 12 months after signup. 
https://aws.amazon.com/blogs/aws/aws-free-tier-data-transfer-expansion-100-gb-from-regions-and-1-tb-from-amazon-cloudfront-per-month/

Answer

Hello.

I find it difficult to provide services using AWS's free tier.  
Looking at your usage, it seems that you are using two EC2 machines, but in the free tier, one EC2 machine runs 750 hours every day for a month, so if you use two machines, it will exceed 750 hours.  
https://aws.amazon.com/free/?nc1=h_ls&all-free-tier.sort-by=item.additionalFields.SortRank&all-free-tier.sort-order=asc&awsf.Free%20Tier%20Types=*all&awsf.Free%20Tier%20Categories=*all

Additionally, Data Transfer is free up to 1GB per region.  
I think this can easily exceed 1GB if users are accessing it.  
https://aws.amazon.com/jp/blogs/aws/aws-free-tier-data-transfer-expansion-100-gb-from-regions-and-1-tb-from-amazon-cloudfront-per-month/

I'm not sure how your application uses S3, but I think this could easily exceed 2000 requests if users are accessing it.

Exceeding the usage limit for one or more AWS Free Tier-eligible services

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