Comparison

RST Scope Pro vs Open Authenticator by Skyost

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RST Scope Pro

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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. Display scaling for iPhone Display size. 6. Function to switch frequency resolution.(40Hz/20Hz/10Hz) 7. Function to switch between bar graph and line graph 8. Function to switch the cross hatch ON / OFF by longTap 9. Function to switch the USB/LSB by Left/Right Swipe 10.Recording/Playback function of Input Sound 11.File Listing function RST Scope(Free) https://www.youtube.com/watch?v=1s9RvOFp52g

About

Open Authenticator by Skyost

This app generates Time-Based One-Time Passwords (TOTPs) to enhance online account security through two-factor authentication. It offers cross-platform syncing, a self-hostable backend, and an intuitive interface for managing your security codes.

Highlights
  • Generates Time-Based One-Time Passwords (TOTPs)
  • Enhances online account security with 2FA
  • Cross-platform token syncing
  • Self-hostable backend option
  • Fast and easy-to-use interface
  • Open-source and free for local use
Read full description

PROTECT YOUR ONLINE ACCOUNTS WITH OPEN AUTHENTICATOR Open Authenticator generates Time-Based One-Time Passwords (TOTPs), which serve as the second factor in the 2FA process. These temporary codes are valid for a short period of time and are used alongside your password to verify your identity when logging into your accounts. This significantly enhances the security of your online accounts and protects them from unauthorized access. KEY FEATURES - Open-Source & Free to use : Our commitment to transparency and security means our app is open-source and will always remain free for local use. If it doesn't cost anything for us, then it shouldn't cost anything for you ! - Cross-Platform Compatibility : Seamlessly sync your TOTP tokens across all your devices, whether you're using iOS, macOS or another platform. - Self-Hostable Backend : You can host the backend on your own server. Your data, your choice. - A lovely crafted app : Open Authenticator has been designed to be fast and easy to use. Quickly find all your TOTPs and copy them directly from the main page ! IN SUMMARY, WHY OPEN AUTHENTICATOR ? Here are the reasons why you should download Open Authenticator : - Enhanced Security : Protect your online accounts from unauthorized access with strong 2FA. - User-Friendly Interface : Intuitive design makes it easy to add, manage, and organize your TOTP tokens. - Continuous Improvement : We're dedicated to delivering the best user experience and regularly update our app with new features and improvements. LINKS - Check it out on Github : https://github.com/openauthenticator-app/openauthenticator - Visit our website : https://openauthenticator.app LEGAL - Privacy policy : https://openauthenticator.app/privacy-policy - Terms of service : https://openauthenticator.app/terms-of-service

Screenshots

RST Scope Pro4 screens
Open Authenticator by Skyost3 screens

Verdict

The call

The clearest difference is price: Open Authenticator by Skyost at Free against RST Scope Pro's $1.99. Open Authenticator by Skyost also leads on device support (4 vs 2). RST Scope Pro's advantage is in-app purchases (none vs 2) and update cadence (every 6 days vs fortnightly). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Open Authenticator by Skyost is free to download; RST Scope Pro costs $1.99 up front. Open Authenticator by Skyost sells 2 in-app purchases, starting at $0.99 per month. RST Scope Pro asks for nothing beyond the download.

UpkeepUpdate frequency

RST Scope Pro ships an update every 6 days, Open Authenticator by Skyost fortnightly. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
RST Scope Pro versus Open Authenticator by Skyost: the parameters behind the verdict, then further details
ParameterRST Scope ProOpen Authenticator by Skyost
Price$1.99Free — better
Rating—4.4 (9 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—9 — better
Update frequencyEvery 6 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.615.0 — better
Further details — not scored
Size1 MB56 MB
Age rating4+4+
Developerkoji kamogawaHugo Delaunay

In-app purchases

None

RST Scope Pro

No in-app purchases

2 purchases

Open Authenticator by Skyost

Subscriptions2
  • Contributor Plan: Monthly$0.991 Month
  • Contributor Plan: Annual$9.991 Year

Questions

Is RST Scope Pro free?
RST Scope Pro costs $1.99, with no in-app purchases.
Is Open Authenticator by Skyost free?
Open Authenticator by Skyost is free to download, with in-app purchases available.
Do RST Scope Pro or Open Authenticator by Skyost have ads?
Neither RST Scope Pro nor Open Authenticator by Skyost shows ads.
Which is updated more often, RST Scope Pro or Open Authenticator by Skyost?
RST Scope Pro ships an update every 6 days, and Open Authenticator by Skyost fortnightly. Most recently, RST Scope Pro was updated on October 18, 2026 and Open Authenticator by Skyost on October 14, 2026.

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