RC vs Blackboard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RC
This stopwatch is designed for model glider contests, allowing pilots to record successive flights within a decreasing worktime. A signal is given when the worktime ends. Tap anywhere to start or stop flights, and access the info button to adjust the worktime duration.
- Record successive flights
- Decreasing worktime countdown
- Start/stop flights with a tap
- Adjustable worktime duration
- Signal at worktime end
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This stopwatch can be used for model glider contests. In a model glider (F3K and F3J) contest, a pilot can fly his plane a number of times within the 'worktime'. Using this application, each successive flight can be recorded while the working time decreases. When the working time ends, a signal is given. Tap anyhwhere in the screen to start or stop a flight. Tap 'Start' to start the countdown timer for the Worktime. Tap the Info button on the down-right corner to edit the duration of the Worktime. This is a free, lite version. The Pro version includes several enhancements including a 'talking timer'. With this talking timer the pilot can hear when the worktime will end. The Pro version also stores the recorded flights in a database on the iPhone.
Blackboard
A straightforward stopwatch app featuring oversized digits for easy visibility. It offers single-button control for starting, stopping, and resetting. With optional Bluetooth integration and a photocell, it can function as a race display, expanding its utility.
- Oversized digits
- Single-button control (start, stop, reset)
- Bluetooth device integration
- Photocell compatibility
- External Bluetooth button support
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Blackboard-Stopwatch This app is a simple stopwatch with very large numbers. The app has only one button with 4 functions: start, stop, pause and reset. In conjunction with my Bluetooth device and a photocell it can be a good display panel for any type of race. In this way, the use has practically no limits. Advertising can be deactivated via the "In-app purchases" option. For the start/stop can be used an external Bluetooth-button. Further information at: http://filippo-software.de Supported languages: German, Italian, English
Screenshots
Verdict
The clearest difference is rating: RC at 5.0 against Blackboard's 2.0. RC also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, update cadence 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
Both are free to download. Blackboard sells 1 one-off in-app purchase. RC asks for nothing beyond the download.
RC holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 33% of RC's written reviews are positive against 0% of Blackboard's.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.
| Parameter | RC | Blackboard |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.0 (2 ratings) |
| Positive reviews | 33.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 3 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Leon Wubbe | Filippo Gozza |
Customer experience
RC
Blackboard
In-app purchases
RC
No in-app purchases
Blackboard
- Full version$2.99
