Timecon vs Graf IoT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Timecon
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This app allows easy conversion of time units from nanoseconds to centuries. It supports seconds, minutes, hours, days, weeks, months, years, as well as milliseconds, microseconds, and nanoseconds. It also covers larger units like decades and centuries. Instantly calculate complex time conversions with ease. Designed for intuitive use, making it suitable for both beginners and professionals.
Graf IoT
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GRAF IoT shows you how much water is in your system at any time and alerts you before it gets critical. The app connects to your GRAF BlueLevel and GRAF ARCOS devices and brings level, volume and system status together on one dashboard. You get a notification when the level runs too low or too high. The built-in weather forecast shows you the rainfall heading for your site. FEATURES • Fill level and remaining volume in litres and percent • Alerts for critical fill levels • Weather forecast for the location of your system • Level height and device status for every system • All devices on one central dashboard • Device data, assignment and location at a glance • Light and dark mode For cisterns and rainwater systems with GRAF BlueLevel and for retention and infiltration systems with GRAF ARCOS. A connected GRAF device is required to use the app.
Screenshots
Verdict
The clearest difference is in-app purchases: Graf IoT at none against Timecon's 2. Graf IoT also leads on ads (none vs shown) and update cadence (monthly vs every 12 months). Timecon's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price 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. Timecon sells 2 in-app purchases, starting at $4.99 per month. Graf IoT asks for nothing beyond the download.
Timecon ships an update every 12 months, Graf IoT monthly. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.
| Parameter | Timecon | Graf IoT |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 12 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 28 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | kota tada | Otto Graf GmbH Kunststofferzeugnisse |
In-app purchases
Timecon
- Ad-free for 1 month7 Days trial$4.991 Month
- Ad-free for 1 year14 Days trial$49.991 Year
Graf IoT
No in-app purchases









