ACI DSIM vs Big Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACI DSIM
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DSIM Bluetooth Controller _ The app helps control DSIM through Bluetooth 4.0 devices _ In the app, you can monitor parameters, collect data from DSIM and apply changes _ Auto/Manual reload data from bluetooth when doing more RF tuning
Big Clock
Track your overtime earnings in real-time with this simple hourly tracker. See your estimated earnings grow by the second, even on your lock screen. Ideal for anyone working by the hour who wants to visualize their extra income.
- Real-time earnings tracking
- Customizable overtime multipliers
- Lock Screen Live Activity
- Big Mode for focused display
- Pause and resume clock
- Overtime history viewing
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Overtime hits different when you can watch it grow. Big Clock is a simple overtime earnings tracker built for people who work by the hour. Enter your hourly rate, choose your overtime multiplier, start the clock, and watch your estimated earnings grow in real time. WATCH YOUR OVERTIME GROW See your estimated overtime earnings increase down to the second. No complicated timesheets. No payroll setup. Just start the clock and watch what your extra time is worth. LIVE ON YOUR LOCK SCREEN Keep an eye on your overtime without constantly opening the app. Big Clock uses Live Activities to display your running estimated earnings right on your Lock Screen. GO BIG Big Mode gives you a clean, focused view of your running overtime earnings—perfect when you just want to see the number that matters. BUILT FOR OVERTIME • Set your hourly rate • Choose 1.5x, 2x, or 3x overtime • Track estimated earnings in real time • See earnings per minute and second • Pause and resume your overtime clock • View your overtime history • Rename saved shifts • Lock Screen Live Activity • Big Mode for an oversized earnings display Whether you're picking up an extra hour or working an entire overtime shift, Big Clock makes it easy—and a little more satisfying—to see what that extra time is worth. Clock in. Watch it grow. Get paid. Big Clock provides estimated earnings based on the hourly rate and overtime multiplier you enter. It is not a payroll, tax, or timekeeping system.
Screenshots
Verdict
The clearest difference is price: ACI DSIM at Free against Big Clock's $1.99. ACI DSIM also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.0). Big Clock's advantage is update cadence (daily vs every 3 weeks). On ads and in-app purchases 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
ACI DSIM is free to download; Big Clock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ACI DSIM ships an update every 3 weeks, Big Clock daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | ACI DSIM | Big Clock |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 59 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | ACI Communications, Inc | DEREK MATTHEW PERRY |
In-app purchases
ACI DSIM
No in-app purchases
Big Clock
No in-app purchases
