FeasyBlue vs Monochron
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FeasyBlue
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Function: The app used for Bluetooth Low Energy communication and modify Feasycom‘s bluetooth module information. Feature: 1.Bluetooth RSSI display. 2.Friendly UI. 3.Configurable UUID. 4.Easier Bluetooth communication. 5.Support OTA hardware firmware.
Monochron
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Monochron is a clock made from three-dimensional puzzles, whose colors have been reduced to black and white. It is a journey into the exploration of the expressive possibilities of the structural grids of these puzzles, where each digit is the best version of itself, achieved with the minimal means of the puzzle tiles and their transformations. As a result, the digits take on peculiar and eccentric shapes while remaining legible. The cubes have three black and three white sides. Every transition is executed with integrity and can be physically replicated on a real cube, adding to the uniqueness of both the concept and its execution. Idea and design — Max Shtok Algorithms and development — Basil Kotov Features: • Black-on-white and white-on-black cube modes • Light or dark background options • Vertical or horizontal orientation with clever transitions • Always fullscreen — the screen remains unlocked, and all system elements are hidden while the app is open • More puzzle shapes coming soon, including Pyraminx and Octahedron
Screenshots
Verdict
The clearest difference is price: FeasyBlue at Free against Monochron's $4.99. FeasyBlue also leads on update cadence (every 3 months vs every 18 months) and iOS requirement (13 vs 15.6). On ads, in-app purchases 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
FeasyBlue is free to download; Monochron costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FeasyBlue ships an update every 3 months, Monochron every 18 months. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.
| Parameter | FeasyBlue | Monochron |
|---|---|---|
| Price | Free — better | $4.99 |
| Update frequency | Every 3 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 — better | 15.6 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | feasycom | Vasilii Kotov |
In-app purchases
FeasyBlue
No in-app purchases
Monochron
No in-app purchases









