Plank Stopwatch Timer vs FFMI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Plank Stopwatch Timer
This app provides a specialized stopwatch and timer for plank exercises. It verbally announces elapsed time intervals or remaining time, allowing users to focus on their workout without constantly checking their screen.
- Voice announcements for elapsed time
- Voice announcements for remaining time
- Customizable time intervals
- Focus on core muscles
- Reduces time anxiety
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Simple stopwatch and timer designed for Plank exercises. This app will surely replace your phone's stopwatch/timer for performing plank exercises. Stopwatch: The app speaks out the elapsed time at the specified interval. Example: "5 seconds", "10 seconds"....1 minute 30 seconds" and so on until stopped. Timer: The app speaks out the remaining time at specified intervals until the timer is finished. No need to look at the screen for the time. Let the app tell you the time so that you can concentrate on your core muscles and let go of the "time anxiety".
FFMI
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Calculate and keep track of your Fat Free Mass Index (FFMI). Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: FFMI at Free against Plank Stopwatch Timer's $2.99. FFMI also leads on update cadence (every 3 months vs every 32 months). Plank Stopwatch Timer's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads 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
FFMI is free to download; Plank Stopwatch Timer costs $2.99 up front. FFMI sells 1 in-app purchase, starting at $0.99 per year. Plank Stopwatch Timer asks for nothing beyond the download.
Plank Stopwatch Timer ships an update every 32 months, FFMI every 3 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.
| Parameter | Plank Stopwatch Timer | FFMI |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.5 (11 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 32 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.7 — better | 16.0 |
| Further details — not scored | ||
| Size | 41 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | RhythmicWorks | Almudena Blanco Morett |
In-app purchases
Plank Stopwatch Timer
No in-app purchases
FFMI
- Full Year Access$0.991 Year
Questions
Is Plank Stopwatch Timer free?
Is FFMI free?
Do Plank Stopwatch Timer or FFMI have ads?
Which is updated more often, Plank Stopwatch Timer or FFMI?
Other comparisons
