Must vs PDF One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Must
Manage all your schedules quickly and easily with this intuitive app. It offers convenient schedule notifications, a dark theme option, and a task monitor to keep track of your to-dos. Organize your tasks systematically using the Eisenhower Matrix and color-coded tags.
- Eisenhower Matrix for systematic task management
- Convenient schedule notifications
- Home screen widgets for quick access
- Customizable color tags for event classification
- Task monitor with filtering options
- Dark theme support
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쉽고 편리한 "must"로 모든 일정을 빠르게 관리하세요. ■ must 앱은, - 쌓여있어 머리 아픈 할 일에 필요 없는 기능은 없앴어요. - 편리한 일정 알림을 받아보세요. - 아이젠하워 매트릭스를 이용해서 체계적으로 일정을 관리할 수 있어요. - 1개의 앱에서 모든 일정을 효과적으로 관리해 보세요. - 다크 테마로 취향에 맞는 갓생을 즐겨보세요. ■ 아이젠하워 매트릭스 & 일정 메모 - 4개의 매트릭스를 마음껏 이용해 보세요. - 사용자 취향에 맞는 분류명/색상으로 설정할 수 있어요. - 새로운 일정을 추가할 때, 다양한 응원 메시지를 확인하는 재미가 있어요. - Task에 대한 세부적인 할 일까지 메모할 수 있어요. ■ 일정 알림 & 홈 화면 위젯 - 편리한 일정 알림으로 여러 일정을 놓치지 마세요. - 홈 화면 위젯으로, 일정을 쉽고 빠르게 확인하세요. ■ 9가지 색상 태그 - 알록달록한 8개 색상과 기본 1개 색상 태그를 설정해 보세요. - 회사, 집, 약속, 경조사, etc... 색상 태그로 다양한 일정을 쉽게 분류해 보세요. ■ 할 일 모니터 - 추가한 모든 일정을 한 눈에 확인할 수 있어요. - 8가지 색상 필터를 사용해서 원하는 분류의 일정만 확인해 보세요. - 남은 할 일, 오늘 할 일 필터를 이용해 보세요.
PDF One
Manage and edit PDF documents with ease. This app offers a powerful viewer, editor, and reader to merge, rotate, delete, and split PDFs. Convert PDFs to images and organize your files efficiently.
- PDF viewing and editing
- Merge multiple PDFs
- Rotate and delete pages
- Split PDFs
- Convert PDF to image
- E-book reader functionality
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* Simple and easy to use, a true 'PDF Editor' Equipped with a powerful PDF viewer, e-book reader, and PDF editor, it allows you to manage your documents efficiently anytime, anywhere. * True to the basics. - Perfectly displays PDFs according to standards. - Powerful search function. - Allows you to see the structure of the document at a glance. * Powerful editing features - Merge multiple PDF documents into one. - Rotate PDF documents. - Delete unnecessary pages. - Split one PDF into multiple files. - Convert PDF to image files. Download 'PDF Editor' now and experience all the features for free! (The PDF Editor app does not have any annoying or surprising ads.)
Screenshots
Verdict
The clearest difference is review sentiment: Must at 90% against PDF One's 0%. Must also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PDF One sells 1 one-off in-app purchase. Must asks for nothing beyond the download.
Must ships an update every 2 months, PDF One every 3 months. The most recent releases landed on October 20, 2026 and October 8, 2026 respectively.
| Parameter | Must | PDF One |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 90.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 52 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | Jichan Hwang | Y Mobile Solution Co. , Ltd. |
Customer experience
Must
PDF One
In-app purchases
Must
No in-app purchases
PDF One
- Ad Removal (Lifetime Free)$3.99
