ADS1115 and ADS1015 are all development boards and programmers.
Difference between ADS1115 and ADS1015
Conclusion of ADS1115 and ADS1015
The ADS1015 is a 12-bit ADC with 4 channels, and the ADS1115 is a higher precision 16-bit ADC with 4 channels. Both have a programmable gain from 2/3x to 16x so you can amplify small signals and read them with higher precision. These two boards are very similar, differing only in resolution and speed. The ADS1115 has a higher resolution and the ADS1015 has a higher sample rate.
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If you are interested in these products, try to follow the below link to see ADS1115.