SunEnergyXT vs Don't be late!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SunEnergyXT
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Introducing SunEnergyXT, the go-to app for managing your home-use solar power stations, perfectly suited for apartment balconies. SunEnergyXT makes it easy to track and optimize your solar energy production. Key features include: - Monitoring of power output, energy yield and savings - Automatic energy bill savings calculation based on user-defined electricity price - Interactive graphs for power output, energy yield and energy bill savings - Compatible with any SunEnergyXT-compatible inverters - Easy switching between output power modes (600W and 800W) - Available in English and German With SunEnergyXT, you'll gain a comprehensive overview of your solar power system's performance, making it simple to optimize energy output and reduce energy costs. Enhance your living space and contribute to a more sustainable future with SunEnergyXT's elegant solar solutions. Download SunEnergyXT now and start making the most of the sun's power today!
Don't be late!
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Don't be late! Never lose track of delays again: This app helps you monitor and manage the punctuality of your friends, coworkers, or even yourself. Whether you’re organizing meetups, tracking work attendance, or just curious about who’s always late, this app makes it easy to log and analyze delays over time.
Screenshots
Verdict
The clearest difference is update cadence: SunEnergyXT at every 3 weeks against Don't be late!'s every 2 months. SunEnergyXT also leads on iOS requirement (13.0 vs 18.2). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
SunEnergyXT ships an update every 3 weeks, Don't be late! every 2 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | SunEnergyXT | Don't be late! |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 113 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Safety Tax Free GmbH | Florian Lammert |
In-app purchases
SunEnergyXT
No in-app purchases
Don't be late!
No in-app purchases
