Comparison

Flappy Board vs Grim Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Flappy Board

Features
Read full description

Transform your iPhone, iPad, or Apple TV into a stunning split-flap display — the iconic mechanical boards once found in airports, train stations, and hotels worldwide. Flappy Board renders each character on individual flipping tiles that cycle with satisfying mechanical animation. Drive it remotely from your home automation system or any app that can send an HTTP request. FEATURES • Authentic split-flap animation — every character tile flips independently at configurable speed • Built-in demos — watch a live departure board fill in with flights and airline logos, or display current weather conditions • Local HTTPS API — Flappy Board runs a secure server on your device, accepting messages from any device on your network • Flappy Board Controller — pair a companion iPhone or iPad app by scanning a QR code; send messages wirelessly • Fully configurable — adjust rows, columns, character set, flip speed, fonts, and colors • Home Assistant and more — works with any HTTP client for easy automation integration • Secure by default — Bearer token authentication and TLS encryption keep your board private THE AMATEUR PLAN Unlock full API control with a one-time in-app purchase. Connect your own scripts, automations, and apps and turn Flappy Board into a live display for anything: sports scores, stock prices, package tracking, calendar events, or whatever data matters to you. Flappy Board is perfect for home dashboards, event signage, smart home projects, and anyone drawn to the nostalgic appeal of mechanical displays.

About

Grim Reader

Organize and enrich your personal library of e-books, comics, and audiobooks. This app allows you to manage your collection locally or via your own servers, adding details like covers and author information. Enjoy a seamless reading and listening experience across all your content.

Highlights
  • Library management for e-books, comics, and audiobooks
  • Enrich library with online book and author data
  • Supports local files and personal servers (WebDAV, OPDS)
  • Cross-device reading and listening progress tracking
  • Organize by author, series, and genre
  • Mark favorites
Features
Read full description

Your books. Your library. Your way. Privacy By Design. Made in the EU. Grim Reader is a modern reader and library manager for e-books, comics and audiobooks. Keep your collection on your device, connect to your own servers, and turn even a simple collection of files into a rich, beautifully organised library. A library that feels alive Browse your collection by books, authors, series and more. See covers, reading progress and detailed information at a glance, continue where you left off, mark favourites and quickly find what you want to read next. Grim Reader is designed for both iPhone and iPad, with an interface that adapts to the device you are using. Enrich your books Missing a cover, description or other information? Grim Reader can help enrich your library using online book and author sources. Depending on the available information, Grim Reader can help you find and add details such as: • Covers and book descriptions • Authors and author information • Series information • Publisher and publication details • ISBN and other identifiers • Genres, categories and tags • Additional book metadata You remain in control and can review and edit your library information. More than e-books Grim Reader brings different types of reading together in one library: • Read e-books • Browse and read comics • Listen to audiobooks • Keep track of reading progress • Continue reading or listening across your library • Organise books by author and series • Mark books and authors as favourites Your files, your servers You don’t need to hand your library over to a commercial book platform. Grim Reader can work with books stored locally and supports personal libraries through WebDAV and OPDS, as well as the optional Grimmory server. This makes Grim Reader equally useful for a small collection on your iPhone or iPad and for a large self-hosted library. Made for readers Grim Reader focuses on your books rather than a store. There are no books to sell you and no ecosystem you need to buy into. Build the library you want, enrich it, organise it and enjoy reading it. Grim Reader — your library belongs to you.

Screenshots

Flappy Board4 screens
Grim Reader3 screens

Verdict

The call

The clearest difference is in-app purchases: Grim Reader at none against Flappy Board's 1. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flappy Board sells 1 one-off in-app purchase. Grim Reader asks for nothing beyond the download.

UpkeepUpdate frequency

Flappy Board ships an update weekly, Grim Reader every 2 weeks. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 8 level
Flappy Board versus Grim Reader: the parameters behind the verdict, then further details
ParameterFlappy BoardGrim Reader
PriceFreeFree
Rating—5.0 (4 ratings) — better
Number of ratings—4 — better
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size11 MB16 MB
Age rating4+4+
DeveloperGeneral Futurics LLCMaarten de Kreij

In-app purchases

1 purchases

Flappy Board

One-time1
  • Amateur$5.99
None

Grim Reader

No in-app purchases

Questions

Is Flappy Board free?
Flappy Board is free to download, with in-app purchases available.
Is Grim Reader free?
Grim Reader is free to download, with no in-app purchases.
Do Flappy Board or Grim Reader have ads?
Neither Flappy Board nor Grim Reader shows ads.
Which is updated more often, Flappy Board or Grim Reader?
Flappy Board ships an update weekly, and Grim Reader every 2 weeks. Most recently, Flappy Board was updated on October 6, 2026 and Grim Reader on October 10, 2026.

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