CAN Studio vs OpenAlarm
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
CAN Studio
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CAN Decoder is an ISO 15765-2 CAN frame utility for quickly and easily understanding the contents of CAN bus data frames. Inspect frame packet data and frame structure in one place on any of your devices. Decode SAEJ1979 standard OBD parameter values instantly, with live-updates as you type. Features: - Copy frame data as hex bytes, as base64 encoding, and as ASCII text. - Import PacketLogger .pklg files that contain OBD scanner session data to automatically extract OBD command/response messages. - Decode ISO 15765-4 CAN 11-bit ID and 29-bit ID. - Decode SAEJ1979 Service 01 standard parameter id values.
OpenAlarm
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OpenAlarm is the alarm clock for mornings when a normal alarm is too easy to silence. Build alarms around the way you actually wake up: β’ Require one or more disarm challenges: Math, Memory, Steps, Shake, or Scan β’ Set a snooze budget so snoozing eventually stops being an option β’ Enable a wake-up check that asks whether you are still awake a few minutes later β’ Schedule repeating weekday and weekend alarms β’ Skip or move one occurrence without changing the repeating schedule β’ Start nap countdowns and pause or extend them β’ Control active naps from the Lock Screen and Dynamic Island OpenAlarm uses Appleβs alarm system so scheduled alarms remain dependable. Your alarms and settings stay on your device. There are no accounts, ads, analytics, or tracking. OpenAlarm is free and open source.
Screenshots
Verdict
The clearest difference is price: OpenAlarm at Free against CAN Studio's $59.99. OpenAlarm also leads on update cadence (every 8 days vs every 3 weeks). CAN Studio's advantage is device support (4 vs 1) and iOS requirement (17.0 vs 26.0). On ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
OpenAlarm is free to download; CAN Studio costs $59.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CAN Studio ships an update every 3 weeks, OpenAlarm every 8 days. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.
| Parameter | CAN Studio | OpenAlarm |
|---|---|---|
| Price | $59.99 | Free β better |
| Update frequency | Every 3 weeks | Every 8 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Mac, Vision Pro β better | iPhone |
| Requires iOS | 17.0 β better | 26.0 |
| Further details β not scored | ||
| Size | 2 MB | 104 MB |
| Age rating | 4+ | 4+ |
| Developer | Fearless design, LLC | Daniel Gretzke |
In-app purchases
CAN Studio
No in-app purchases
OpenAlarm
No in-app purchases









