Symbol Keys vs FormantScope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Symbol Keys
This keyboard app offers a wide array of Unicode symbols for easy access. Customize your typing experience with a personal touch, enhancing communication across various platforms.
- Extensive Unicode symbol library
- Customizable keyboard layout
- Enhanced communication
- Easy symbol access
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A simple, customizable keyboard that gives you access to hundreds of Unicode symbols
FormantScope
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FormantScope analyzes your voice in real time on device: it shows fundamental frequency (F0), the first and second formants (F1 and F2), and input level, with short history charts for practice and coaching. • Live numeric readouts for F0, F1, F2, and level • Dual-series charts with independent scales • Stability and gating to reduce flicker during continuous phonation • Optional WAV export to a folder you choose • iPhone, iPad, and Mac; microphone is used only for local analysis • No account required; open-source project (see support link) FormantScope does not send your microphone audio to the developer for processing. Optional recordings are saved only where you select on your device.
Screenshots
Verdict
The clearest difference is update cadence: Symbol Keys at every 2 weeks against FormantScope's every 6 weeks. 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.
Symbol Keys ships an update every 2 weeks, FormantScope every 6 weeks. Both last shipped on October 24, 2026.
| Parameter | Symbol Keys | FormantScope |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 2 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Ji Hoon Lee | 跃然 王 |
In-app purchases
Symbol Keys
No in-app purchases
FormantScope
No in-app purchases
Questions
Is Symbol Keys free?
Is FormantScope free?
Do Symbol Keys or FormantScope have ads?
Which is updated more often, Symbol Keys or FormantScope?
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