Key vs super simple to do list
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Key
This application uses your device's microphone to capture and decode dual-tone multi-frequency (DTMF) signals in real-time. It displays the decoded numbers instantly on your screen, making it a useful tool for professionals and tech enthusiasts.
- Real-time DTMF signal decoding
- Uses device microphone
- Displays decoded numbers instantly
- Suitable for professionals
- Useful for tech enthusiasts
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Key-Tone-Decoder: Real-Time DTMF Signal Decoder Dual-tone multi-frequency (DTMF) signaling is a telecommunication system that facilitates communication between telephone equipment, other devices, and switching centers using voice-frequency tones over telephone lines. Key-Tone-Decoder leverages your iPhone's microphone to capture these DTMF signals, instantly decoding them and displaying the decoded numbers on your screen in real-time. Perfect for professionals and tech enthusiasts, Key-Tone-Decoder makes it easy to decode DTMF signals right from your device.
super simple to do list
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The only to-do list app you'll ever need - because it does less. No notifications. No folders. No projects, tags, or productivity systems. Just your tasks, written down, checked off. YOUR LIST ON YOUR LOCK SCREEN Pin your to-do list to the Lock Screen and check things off without even unlocking your phone. Add a widget to your Home Screen too — tap the circle, task done, right from the widget. MAKE IT TRULY YOURS Pick from 20 hand-crafted themes: handwriting on notebook grid paper, a ruled journal with a red margin, sticky-note marker, chalkboard, typewriter, green-on-black terminal, elegant serif, and more. Add an optional font color and the whole list — text, checkmarks, everything — follows. SIMPLE MEANS SIMPLE • Type a task, hit return, type the next one • Tap the circle to strike it out • Swipe left to delete, hold and drag to reorder • Clear all your done tasks in one tap PRIVATE BY DESIGN No account. No sign-up. No analytics, no tracking, no third-party anything. Your tasks live on your device and nowhere else. Free. Simple. Yours.
Screenshots
Verdict
The clearest difference is price: super simple to do list at Free against Key's $0.99. Key's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). 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
super simple to do list is free to download; Key costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Key | super simple to do list |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI | Andeesh Mehdi Syed |
In-app purchases
Key
No in-app purchases
super simple to do list
No in-app purchases









