SideBooks vs Poste
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SideBooks
This app offers a high-performance PDF and comic viewer with realistic paper-turning animations. It supports various viewing directions, enhanced bookshelf management, and secure password protection for your documents. Easily import files from multiple sources and enjoy a customizable reading experience.
- Realistic paper curl animation
- Multiple viewing directions
- Enhanced bookshelf management
- Password protection
- Dropbox and iTunes file import
- Supports PDF, ZIP, CBZ, RAR, CBR
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SideBooks is a high performance, high speed PDF viewer that allows you to enjoy reading with the feel of actual paper. =Features= Curl animation that simulates the actual turning of paper pages has been added to the standard page slide function. Supports viewing from 3 directions, documents that open left to right, right to left and vertically. It provides the optimal environment for viewing any book. All zoom rates have been optimized providing high speed, dynamic screen display. An infinite hierarchy of folders can be created, moved, deleted, renamed, etc. using the enhanced bookshelf management function. Real visual bookshelf function that corresponds to back cover style display. Files can be imported by 3 methods, Network transfer through Dropbox, USB transfer through iTunes and direct transfer from other applications. Books can be protected so others cannot view them by using the password protected locking function. This is a universal application that operates on the iPhone, iPod Touch and iPad. =Functions= Overall: *Brightness Adjustment *Screen rotates to match the orientation of the device *Screen Rotation Lock *Password Protected Start-up Lock Viewer: *Support PDF,ZIP,CBZ,RAR and CBR format *Page Turning: Choose from slide or curl *Viewing Directions: Choose from opening left to right / right to left / vertically *Page Spacing: Choose form wide / narrow / none *Facing Pages: Choose the pair of facing pages by setting the cover to on or off *Trim function within the range of page display *Cache pre-read function for the previous and next pages *Set the display for each book and remember the page number of the last page read *Text search function (list display type) *Contents function (also supports hierarchy type) *Bookmark function (with editable memos) *Edit handwritten notes *Send to other applications (Open-In) *Send by email *Printing function (Air Print) *In-page link function *Link to outside URL function (built-in browser / Safari / Printing) *Display / Don't Display link buttons *Page turning function using tap or swipe *Expansion / Contraction function using pinch and double tap (1-1024x zoom) *Viewing of encrypted PDF files with password protection *Display / non-display of statusbar when reading Bookshelf: *Display form: Choose form list bookshelf / visual bookshelf *Function to set theme of visual bookshelf with each folder *Bookshelf thema extension pack (Add-On) *Cover editing function (corresponds to the trim) *File editing function: create, move, delete, setting for all books in folder *Bookmark list *Reading history list *Unread list *Edit of mark choose form already read / unread *Book name search function *Network transfer through Dropbox *USB transfer through iTunes *Direct transfer from other applications Special thanks to, "Give My Regards to Black Jack" SHUHO SATO Manga on Web http://mangaonweb.com
Poste
Access and organize a variety of free digital magazines, brochures, and publications. Save your favorite content, easily revisit it later, and share it with friends. Discover new content through web links or QR codes.
- Browse free magazines and publications
- Save content to your digital bookshelf
- Revisit and share saved content
- Discover content via web links
- Use QR codes to add content
- Receive notifications for new content
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Poste(ポステ)は、フリーマガジンを中心とした様々なコンテンツを手軽に閲覧することができるアプリです。 様々な企業、団体、個人が、フリーマガジン、広報誌、会報誌、パンフレットなどを提携サイトで公開しており、ユーザーが気になるコンテンツをアプリ上の登録してご覧頂くこと、後から簡単に見返すこと、友達に共有することが可能です。 このアプリの使い方■ ●コンテンツを入手 コンテンツが公開されているWebページ上で「アプリで見る」をタップするか、アプリ上の「QRを読み込む」を利用することでコンテンツを入手できます。 ●サイトタブ コンテンツを入手したサイトが自動的に登録されます。 ●通知 送られてきた通知を受け取る事ができます。 ●本棚 入手したコンテンツが保存されます。コンテンツをタップすると閲覧できます。 一覧の中を検索することもできます。 ●コンテンツ閲覧 コンテンツを閲覧することができます。 タップまたはスライドでページをめくることができます。 ■動作確認端末 アプリがリリースされた時点での、最新のiOSバージョンで動作確認しております。 iOSが古いバージョンの場合、問題が起こる可能性があるためiOSを最新バージョンにしてご利用ください。 アプリがリリースされた日付は「履歴」をご確認ください。
Screenshots
Verdict
The clearest difference is review sentiment: SideBooks at 72% against Poste's 0%. SideBooks also leads on ratings volume (97 vs 1) and update cadence (every 9 days vs every 2 months). Poste's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.6). On price, ads and device support 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. SideBooks sells 1 one-off in-app purchase. Poste asks for nothing beyond the download.
Poste holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SideBooks has 97 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 72% of SideBooks's written reviews are positive against 0% of Poste's, so the app with the better star average is not the one people write more warmly about.
SideBooks ships an update every 9 days, Poste every 2 months. The most recent releases landed on September 25, 2026 and September 23, 2026 respectively.
| Parameter | SideBooks | Poste |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (97 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 72.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 97 — better | 1 |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 32 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | Tatsumi-system Co., Ltd. | Cloud CIRCUS, Inc. |
Customer experience
SideBooks
Poste
Bugs and requests
SideBooks
Reported bugs
3 issues- Crashes when opening certain PDF files
- Corrupted files cause repeated crashes
- Dropbox integration issues on some devices
Requested features
6 requests- Add support for ePub and other popular formats
- Implement iCloud/Google Drive integration
- Allow manual rearrangement of bookshelf
- Add dark mode and customizable background options
- Improve bookmark and annotation features
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- Implement a more intuitive file management system
Poste
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SideBooks
- Thema extension Add-On$0.99
Poste
No in-app purchases









