Comparison

Crazyflie 2 vs Bluetooth Serial Connect

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

Head to head
About

Crazyflie 2

Control a palm-sized, open-source quadcopter directly from your iOS device. Utilize on-screen joysticks or phone tilting for flight. Customize control sensitivity and modes, and update the drone's firmware.

Highlights
  • Bluetooth low energy connectivity
  • On-screen joystick controls
  • Phone tilting flight control
  • Configurable control sensitivity
  • Configurable control modes
  • Firmware updates
Features
Read full description

Control Crazyflie 2.x directly from your iOS device using Bluetooth low energy. The Crazyflie 2 is a flying open source development platform in the form of a palm sized quadcopter. The platform supports hardware expansions as well as advanced software features for development. This app requires a Crazylfie with a recent firmware. Firmware >= 2024.02 are compatible. Functionalities: - Connect to a Crazyflie 2.0 using BLE - Control a Crazyflie 2.0 using on-screen joysticks or by tilting the phone - Configurable control sensitivity - Configurable control mode - Update the Crazyflie firmware with latest version

About

Bluetooth Serial Connect

Control your Arduino projects with your phone. Design custom interfaces with buttons, joysticks, and displays to send and receive data via Bluetooth low-energy modules. An integrated library simplifies the connection process.

Highlights
  • Customizable control boards
  • Button and joystick inputs
  • Display integration
  • Bluetooth low-energy module support
  • Arduino library for easy integration
Features
Read full description

Turn your iPhone or iPad into a custom control panel for Arduino and BLE projects, without building a dedicated iOS app. Bluetooth Serial Connect lets you design a board, connect to an HM-10-style Bluetooth Low Energy (BLE) UART module, and exchange commands and live readouts with your hardware. The companion Bluetooth Serial Connect Arduino library makes it straightforward to read controls and update displays, indicators, and gauges in your sketch. DESIGN YOUR BOARD Place, move, resize, and customize nine component types: • Buttons with momentary, latch, and repeat behavior • Joysticks, sliders, toggles, and D-pads • Text displays, labels, indicators, and gauges Assign channel numbers that stay fixed when you rearrange controls. Fine-tune colors, labels, value ranges, board appearance, and haptic feedback. Undo and redo changes, duplicate and lock controls, snap them to the grid, and adjust their front-to-back order. START WITH TEMPLATES AND EXAMPLES Explore seven editable board templates for RC cars, robotic arms, menu remotes, sensor hubs, smart-home relays, and more. Companion Arduino sketches and protocol examples help you connect the app to your code. Follow the interactive walkthrough or try a board with simulated data—no hardware required. Import, export, share, and duplicate boards as your projects grow. CONNECT AND TROUBLESHOOT Scan for nearby BLE devices, follow clear connection progress, remember frequently used modules for quick reconnecting, and configure service and characteristic UUIDs. Use the timestamped two-way console to inspect sent and received messages or send console text while you troubleshoot. Setup guides, wiring help, complete examples, and the wire protocol reference are available at bluetooth.henhen1227.com. Bluetooth Serial Connect is designed for HM-10-style BLE modules. Other BLE UART hardware may work when its service and characteristic UUIDs match the app settings. HC-05 and HC-06 Bluetooth Classic modules are not supported. A compatible BLE module is required for live hardware control. FREE OR PRO Start with one board free. Add more by watching rewarded ads, or unlock Bluetooth Serial Pro with a one-time in-app purchase for unlimited boards and no ads. The free version may also show occasional ads after edits. Existing boards remain available to use. No app account is required. Board files stay on your device unless you choose to share them.

Screenshots

Crazyflie 22 screens
Bluetooth Serial Connect4 screens

Verdict

The call

Crazyflie 2 and Bluetooth Serial Connect both sit at 3.7 stars, but that hides the real split: 50% of Crazyflie 2's written reviews are positive against 0% of Bluetooth Serial Connect's. Crazyflie 2 also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.2). On price, rating, ratings volume and update cadence 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.7 for Crazyflie 2 against 3.7 for Bluetooth Serial Connect. Both are backed by a comparable volume of ratings — 3 and 7 respectively. Written reviews are what separate them: 50% of Crazyflie 2's written reviews are positive against 0% of Bluetooth Serial Connect's.

UpkeepUpdate frequency

Crazyflie 2 ships an update every 13 months, Bluetooth Serial Connect every 10 months. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
Crazyflie 2 versus Bluetooth Serial Connect: the parameters behind the verdict, then further details
ParameterCrazyflie 2Bluetooth Serial Connect
PriceFreeFree
Rating3.7 (3 ratings)3.7 (7 ratings)
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings37 — better
Update frequencyEvery 13 monthsEvery 10 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.2
Further details — not scored
Size8 MB24 MB
Age rating4+4+
DeveloperBitcrazeHenry Abrahamsen

Customer experience

Crazyflie 2

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bluetooth Serial Connect

All ratings7 ratings
Positive57.1%
Neutral28.6%
Negative14.3%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Crazyflie 2

No in-app purchases

None

Bluetooth Serial Connect

No in-app purchases

Questions

Is Crazyflie 2 free?
Crazyflie 2 is free to download, with no in-app purchases.
Is Bluetooth Serial Connect free?
Bluetooth Serial Connect is free to download, with no in-app purchases.
Which has better reviews, Crazyflie 2 or Bluetooth Serial Connect?
Crazyflie 2 and Bluetooth Serial Connect are both rated 3.7 out of 5 on the App Store, from 3 and 7 ratings respectively.
Do Crazyflie 2 or Bluetooth Serial Connect have ads?
Bluetooth Serial Connect shows ads; Crazyflie 2 does not.
Which is updated more often, Crazyflie 2 or Bluetooth Serial Connect?
Crazyflie 2 ships an update every 13 months, and Bluetooth Serial Connect every 10 months. Most recently, Crazyflie 2 was updated on October 14, 2026 and Bluetooth Serial Connect on September 29, 2026.

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