Lalitha Trishathi Stotram is also known as the Sarva Poorthikara stotram.
LalithaSahasranama and Lalitha Trishathi(both from Brhamanda purana).
These are contained in the chapter called Lalithopakyanam .
This entire chapter is in the form of conversation between Hayagreeva
(an avatara of Vishnu with a horse head) and Agasthya, who is one of the important saptha rishis.
Hayagreeva teaches Agasthya LalithaSahasranama but hesitates to reveal the secret of Sri Chakra worship.
The Sri Chakra Yantra is the yantra of the Goddess of True Wealth.
Goddess Lalitha herself appears before Hayagreeva and asks him to teach Agasthya,
the Sarva Poorthikara stotra meaning “that stotra which completes everything"
since agastya and his wife Lopamudra are great devotees of her.

This stotra recounts the 300 names of the goddess. Twenty names each start from each
of the fifteen letters which form the Pancha dasakshari manthra (the 15 letter manthra).

Chanting the mantra makes the mind becomes full of contentment and peace.
This app has Lalitha Trishati lyrics in Telugu,Hindi,Kannada,Malayalam,English