CloudLogOffline vs RST Scope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CloudLogOffline
This app serves as a portable logbook for HAM radio operators, allowing them to record QSOs even without an internet connection. Logs can be uploaded to a self-hosted Cloudlog instance once connectivity is restored. It supports API uploads, QRZ.com queries, and integration with Flrig for radio interaction.
- Offline QSO logging
- Upload to Cloudlog instance
- QRZ.com query support
- Flrig integration
- Set CQ QRG
- Live and post QSOs
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CloudLogOffline is an app interface for Cloudlog the cloud logbook for HAM radio OMs and YLs by 2M0SQL et al. The main purpose of CloudLogOffline is the portable operating mode, where no Wifi or 3G/LTE is availabe, e.g. SOTA, IOTA, WWFF, POTA or COTA. The logs can be stored in the app and when back to an internet connection, the log can be uploaded to a selfhosted Cloudlog instance. Currently CloudLogOffline supports following features: - Upload to Cloudlog via API - Query QRZ.com (if 3G/LTE is available) - Connect to Flrig by W1HKJ which e.g. runs on a Raspberry Pi which is connected to the radio and opens a Wifi to interact with CloudLogOffline - Set a CQ QRG if Flrig is not available - Live and post QSOs - Many more
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
Screenshots
Verdict
The clearest difference is rating: RST Scope at 5.0 against CloudLogOffline's 3.0. RST Scope also leads on update cadence (every 3 days vs every 6 weeks) and iOS requirement (15.6 vs 17). CloudLogOffline's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, 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.
RST Scope holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
CloudLogOffline ships an update every 6 weeks, RST Scope every 3 days. The most recent releases landed on August 18, 2026 and August 22, 2026 respectively.
| Parameter | CloudLogOffline | RST Scope |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 81.8% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17 | 15.6 — better |
| Further details — not scored | ||
| Size | 41 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Deutscher Amateur-Radio-Club e. V. | koji kamogawa |
Customer experience
CloudLogOffline
RST Scope
In-app purchases
CloudLogOffline
No in-app purchases
RST Scope
No in-app purchases
