Rule of Three Calculator vs FT8 Decoder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rule of Three Calculator
This utility app helps you solve problems involving ratios and proportions. It calculates an unknown number based on the relationship between two other known numbers.
- Ratio calculation
- Proportion solving
- Finds unknown numbers
- Simple interface
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Calculator for finding a number in the same ratio to a given number as exists between two other given numbers.
FT8 Decoder
This application decodes FT8 digital signals from amateur radio bands. It can process audio from external sources or directly from an SSB radio or SDR. The app also generates FT8 modulated audio for experimentation.
- Decodes FT8 8FSK modulated signals
- Processes external audio or SDR sound
- Supports standard callsigns and 13-character messages
- Generates FT8 message audio
- Experiment with sending and receiving FT8 audio
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An FT8 decoder. FT8 is a weak signal digital mode, currently very popular in the amateur radio HF shortwave bands. The ft8d app allows decoding FT8 8FSK modulated signals contained in externally provided audio or sound from an SSB radio or SDR. The app supports Level 1 decoding of messages with standard callsigns or 13 character free text messages. The app can also generate standard FT8 message audio, so can be used to experiment with sending and receiving FT8 encoded and modulated audio. The app does NOT perform Auto-sequencing, or decode long hashed callsigns.
Screenshots
Verdict
The clearest difference is review sentiment: FT8 Decoder at 50% against Rule of Three Calculator's 0%. FT8 Decoder also leads on rating (4.3 vs 2.3) and in-app purchases (none vs 1). Rule of Three Calculator's advantage is price (Free vs $1.99) and iOS requirement (8.0 vs 15.4). On ratings volume, ads 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
Rule of Three Calculator is free to download; FT8 Decoder costs $1.99 up front. Rule of Three Calculator sells 1 one-off in-app purchase. FT8 Decoder asks for nothing beyond the download.
FT8 Decoder holds the better App Store score, 4.3 against 2.3. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews point the same way: 0% of Rule of Three Calculator's written reviews are positive against 50% of FT8 Decoder's.
| Parameter | Rule of Three Calculator | FT8 Decoder |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 2.3 (4 ratings) | 4.3 (8 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 4 | 8 — better |
| Update frequency | — | Every 18 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 16 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Saran Dumronggittigule | HotPaw Productions |
Customer experience
Rule of Three Calculator
FT8 Decoder
In-app purchases
Rule of Three Calculator
- Remove Ads$0.99
FT8 Decoder
No in-app purchases
Questions
Is Rule of Three Calculator free?
Is FT8 Decoder free?
Which has better reviews, Rule of Three Calculator or FT8 Decoder?
Do Rule of Three Calculator or FT8 Decoder have ads?
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