Comparison

Bluetooth Serial Connect vs Days Since

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

Days Since

Features
Read full description

Days Since answers one question: how long has it been since you last did this? Changed the furnace filter. Watered the plants. Called your parents. Replaced your toothbrush. Had the oil changed. These are the things that matter but never fit on a calendar, because they don't happen on a schedule — they happen when they happen. Add a tracker. Tap once when you do the thing. That's the whole app. ONE TAP, FROM ANYWHERE Log a completion from the list, the detail screen, a Home Screen widget, your Apple Watch, or by asking Siri. It takes a second, so you'll actually do it. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Bluetooth Serial Connect4 screens
Days Since3 screens

Verdict

The call

The clearest difference is in-app purchases: Bluetooth Serial Connect at none against Days Since's 2. Bluetooth Serial Connect also leads on iOS requirement (16.2 vs 18.0). Days Since's advantage is ads (none vs shown) and update cadence (daily vs every 10 months). On price 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. Days Since sells 2 in-app purchases, starting at $1.99 per month. Bluetooth Serial Connect asks for nothing beyond the download.

UpkeepUpdate frequency

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

Scorecard4 real differences · 6 level
Bluetooth Serial Connect versus Days Since: the parameters behind the verdict, then further details
ParameterBluetooth Serial ConnectDays Since
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, Apple Watch
Requires iOS16.2 — better18.0
Further details — not scored
Size24 MB4 MB
Age rating4+4+
DeveloperHenry AbrahamsenSteven Zilberberg

In-app purchases

None

Bluetooth Serial Connect

No in-app purchases

2 purchases

Days Since

Subscriptions1
  • Day Since Premium (Monthly)$1.991 Month
One-time1
  • Days Since Premium Lifetime$19.99

Questions

Is Bluetooth Serial Connect free?
Bluetooth Serial Connect is free to download, with no in-app purchases.
Is Days Since free?
Days Since is free to download, with in-app purchases available.
Do Bluetooth Serial Connect or Days Since have ads?
Bluetooth Serial Connect shows ads; Days Since does not.
Which is updated more often, Bluetooth Serial Connect or Days Since?
Bluetooth Serial Connect ships an update every 10 months, and Days Since daily. Most recently, Bluetooth Serial Connect was updated on September 29, 2026 and Days Since on October 13, 2026.

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