single-purpose program
nounUK /ˌsɪŋɡəl ˈpɜːpəs ˈprəʊɡræm/
US /ˌsɪŋɡəl ˈpɜːrpəs ˈproʊɡræm/
A single-purpose program is a computer program made to do just one job.
The calculator app is a single-purpose program that only does math.
OTHER MEANINGS
2. A program built for one narrow task instead of many general tasks.
Unlike a full office suite, this single-purpose program only converts files.
3. A small tool designed to perform one function quickly and simply.
She wrote a single-purpose program to rename all her photos at once.
4. Software created for a specific use rather than general computing.
The single-purpose program runs the lab's temperature sensor and nothing else.