The low level of mastery of concepts by elementary school students in Indonesia, especially in science subjects, impacts students' low learning outcomes and enthusiasm for participating in teaching and learning activities. So to maximize the learning process, teachers must start utilizing the use of media. This study aims to see the effectiveness of the "BELIPARU" application media, which is oriented towards mastering the concept of fifth-grade students. This research belongs to the type of development research developed using the Borg and Gall model, with four research stages consisting of the idea gathering and reference stages, product manufacturing stage, media validation stage and material validation stage, product revision stage, and trial stage. The test subjects were conducted on 29 students in class V. This data collection method was carried out through observation, written test instruments in the form of pretest and post-test questions, and closed questionnaires for students. The data obtained in this study were then analyzed using descriptive-quantitative analysis techniques through the SPSS application, which were then thoroughly described using descriptions. The research analysis showed that the media expert test produced a percentage of 92.5% in the very good category. In comparison, the results of the material experts produced a percentage of 90.6% in the very good category, although there was a slight minor revision in the validator. Furthermore, the results of the pretest activity trials showed an average of 22.24, and the results of post-test activity testing showed an average of 64.31. Based on these results, Android-based applications are very suitable for students' learning process, especially in increasing mastery of concepts.

<p class="abstrak">Persepsi diartikan sebagai suatu proses mengenali, menyusun serta menafsirkan suatu informasi guna memberikan pemahaman yang berguna mengenai informasi tersebut. Penelitian ini mengangkat mengenai persepsi wirausahawan terhadap usaha dimasa pandemi. Penelitian ini bertujuan untuk mengetahui apa saja yang dirasakan wirausahawan terhadap kegiatan usahanya selama pandemi ini. Partisipan pada penelitian ini adalah satu orang wirausahawan dengan kegiatan usaha membuka warung kecil di rumah pribadinya yang berada di wilayah, Kabupaten Sumedang, Jawa Barat. Pengambilan data dilakukan dengan menggunakan teknik kuisioner dan observasi serta dilaksanakan dengan cara wawancara secara langsung kepada pelaku usaha. Pendekatan yang digunakan yaitu pendekatan kualitatif dan desain penelitiannya adalah studi kasus. Masa pandemi saat ini dikatakan membawa dampak buruk bagi pelaku usaha. Sebab, dengan adanya masa pandemi penghasilan yang didapat menjadi berkurang dari yang biasanya. Selain itu, dikarenakan banyaknya orang yang mengalami PHK maka persaingan dagang dilingkungan pun semakin merebak.  Hal tersebut menjadikan pelaku usaha untuk lebih keras lagi memutar pikiran guna menghadapi persaingan pasar dan menstabilkan pendapatan.</p>