The advent of large language models (LLMs) has opened up new opportunities in
the field of mobile task automation. Their superior language understanding and
reasoning capabilities allow users to automate complex and repetitive tasks.
However, due to the inherent unreliability and high operational cost of LLMs,
their practical applicability is quite limited. To address these issues, this
paper introduces MemoDroid, an innovative LLM-based mobile task automator
enhanced with a unique app memory. MemoDroid emulates the cognitive process of
humans interacting with a mobile app -- explore, select, derive, and recall.
This approach allows for a more precise and efficient learning of a task's
procedure by breaking it down into smaller, modular components that can be
re-used, re-arranged, and adapted for various objectives. We implement
MemoDroid using online LLMs services (GPT-3.5 and GPT-4) and evaluate its
performance on 50 unique mobile tasks across 5 widely used mobile apps. The
results indicate that MemoDroid can adapt learned tasks to varying contexts
with 100% accuracy and reduces their latency and cost by 69.22% and 77.36%
compared to a GPT-4 powered baseline.

MemoDroid 是一种基于大型语言模型的创新移动任务自动化器，通过模拟人类与移动应用程序的认知过程（探索、选择、推导和回忆），将任务分解为可重用、可重新排列和适应于各种目标的模块化组件，实现对任务过程的精确和高效学习。使用在线语言模型服务（GPT-3.5 和 GPT-4）实现 MemoDroid，并在 5 个广泛使用的移动应用程序上对 50 个独特的移动任务进行评估。结果表明，与 GPT-4 驱动的基线相比，MemoDroid 能够以 100％的准确性适应不同的上下文，将任务的延迟和成本分别降低了 69.22％和 77.36％。