RST Scope vs QTH Locator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RST Scope
This utility app provides spectrum scope and waterfall displays for amateur radio operators. It enhances radios lacking these features by analyzing microphone input, allowing for clear distinction of Morse code and detailed audio frequency visualization.
- Spectrum scope and waterfall display
- Morse code distinction via FFT
- Adjustable waterfall speed
- Adjustable audio input level
- Switchable display band (wide/narrow)
- Display pause function
- Recording and playback of input sound
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This is an app for amateur radio operators with a narrow band of audio frequency, spectrum scope & waterfall display. You can get a rich display by microphone inputting the speaker output of a radio that does not have a spectrum scope or waterfall function. The FFT allows you to distinguish between the dot and dash of Morse code. [function] 1. Ability to change the speed of the waterfall 2. Ability to adjust the level of audio input 3. Function to switch the display band between wide and narrow 4. Display pause function (pause / cancel by touching the screen) 5. Function to switch the cross hatch ON / OFF by longTap 6. Frequency resolution is fixed at 40Hz. 7. Function to switch the USB/LSB by Left/Right Swipe 8.Recording/Playback function of Input Sound RST Scope(Free) https://www.youtube.com/watch?v=1s9RvOFp52g
QTH Locator
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QTH Locatorの特徴 ・現在の位置情報の取得(緯度,経度) ・位置情報から住所取得 ・位置情報からGridLocatorへ変換 ・位置情報保存 ● 現在の位置情報の取得(緯度,経度) 中央下部のボタンより現在位置を取得し地図へ表示 ● 位置情報から住所取得 取得した位置情報から外部APIへ接続、住所を取得し表示 ● 位置情報からGridLocatorへ変換 取得した位置情報からGridLocatorへ変換し表示 ● 位置情報保存 下部の表示エリアをタップする事により情報を保存
Screenshots
Verdict
The clearest difference is ads: QTH Locator at none against RST Scope's shown. RST Scope's advantage is update cadence (every 3 days vs every 7 months). On price, in-app purchases, device support and iOS requirement 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.
RST Scope ships an update every 3 days, QTH Locator every 7 months. The most recent releases landed on August 22, 2026 and September 18, 2026 respectively.
| Parameter | RST Scope | QTH Locator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days — better | Every 7 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | koji kamogawa | Masahiro Ono |
In-app purchases
RST Scope
No in-app purchases
QTH Locator
No in-app purchases
