Comparison

Bluetooth Serial Connect vs Main

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

Head to head
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.

About

Main

Features
Read full description

Main-Tain keeps everything you own running. Cars, homes, boats, motorcycles, RVs, tractors, equipment — one app, one schedule, nothing forgotten. START FREE Track your first vehicle, home, or machine at no cost, with every feature included. Not a trial — no countdown, no card required. Subscribe when you're ready to add more. EVERYTHING IN ONE PLACE Add what you own and Main-Tain keeps its full history: what was serviced, when, what it cost, and who did it. Stop digging through the glovebox. SCHEDULES THAT FIT Start from recommended intervals or set your own — by mileage, by time, or by engine hours. A tractor and a sedan don't need the same plan, so they don't get the same one. REMINDERS THAT LAND Get notified when something is coming due, before it becomes a repair bill. RECEIPTS AND PHOTOS Attach receipts, invoices, and photos to any service record. Warranty claims and resale conversations get a lot easier when you can show the paperwork. BUILT FOR RESALE Complete, documented service history is what separates a fair price from a lowball offer. Main-Tain keeps yours ready. WORKS OFFLINE Log service in a garage, a barn, or a driveway with no signal. It syncs when you reconnect. SUBSCRIPTION Main-Tain is free for your first item. A subscription adds unlimited vehicles, homes, and equipment: • Monthly — $0.99 • Yearly — $9.99 Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Terms of Use: https://main-tain.app/terms Privacy Policy: https://main-tain.app/privacy

Screenshots

Bluetooth Serial Connect4 screens
Main4 screens

Verdict

The call

The clearest difference is in-app purchases: Bluetooth Serial Connect at none against Main's 2. Main's advantage is ads (none vs shown) and update cadence (daily vs every 10 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Main sells 2 in-app purchases, starting at $0.99 per month. Bluetooth Serial Connect asks for nothing beyond the download.

UpkeepUpdate frequency

Bluetooth Serial Connect ships an update every 10 months, Main daily. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Bluetooth Serial Connect versus Main: the parameters behind the verdict, then further details
ParameterBluetooth Serial ConnectMain
PriceFreeFree
Rating3.7 (7 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 10 monthsDaily — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.216 — better
Further details — not scored
Size24 MB19 MB
Age rating4+4+
DeveloperHenry AbrahamsenHayden Patteson

In-app purchases

None

Bluetooth Serial Connect

No in-app purchases

2 purchases

Main

Subscriptions2
  • Monthly Main-Tain Subscription$0.991 Month
  • Main-Tain Yearly Subscription$9.991 Year

Questions

Is Bluetooth Serial Connect free?
Bluetooth Serial Connect is free to download, with no in-app purchases.
Is Main free?
Main is free to download, with in-app purchases available.
Do Bluetooth Serial Connect or Main have ads?
Bluetooth Serial Connect shows ads; Main does not.
Which is updated more often, Bluetooth Serial Connect or Main?
Bluetooth Serial Connect ships an update every 10 months, and Main daily. Most recently, Bluetooth Serial Connect was updated on September 29, 2026 and Main on September 30, 2026.

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