Comparison

SDR vs Hidden Room

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

Head to head
About

SDR

Control your Icom transceiver remotely or locally from your iPhone. Operate in all modes, log QSOs, and utilize integrated digital modes like FT8/FT4 and SSTV. No extra hardware is needed for global access.

Highlights
  • Remote transceiver operation
  • All mode control
  • Auto logging logbook
  • Integrated FT8/FT4 tool
  • Integrated SSTV receiver
  • Integrated CW decoder and keyer
  • DX-Cluster integration
Currently charting
Read full description

Software Defined Radio Client for Icom Transceivers and your iPhone SDR-Control Mobile is a full featured iPhone App to operate your Icom Transceiver at home or from around the world without additional Hard- or Software. Important: This App requires one of the following Icom Transceivers: IC-705, IC-7610, IC-9700, IC-7760 or the IC-R8600 Receiver or the new IC-7300 MK2 FACTS AND FEATURES: ■ Native iOS 26 app, backward compatible to iOS 17 ■ Compatible with any iPhone ■ Complete operation of your Icom Transceiver in all modes ■ Use the App local or to remote access of your Transceiver from any place without additional Hard- or Software ■ Logbook with auto logging, ADIF Im-/Export ■ UDP Log submission when using external logging software ■ Integrated full featured FT8 / FT4 Tool ■ Integrated SSTV receiver (NEW) ■ Integrated CW Decoder ■ Integrated CW Keyer ■ DX-Cluster integration ■ Call sign lookup integrated ■ Displays Calls on Map with heading and distance information ■ And much more... WHAT YOU NEED: - An Icom IC-705, IC-7610, IC-9700 or IC-7760 Transceiver or IC-R8600 Receiver or the new IC-7300 MK2 - The Transceiver needs to be connected to your Network (WiFi or LAN) - No USB cable needed or supported - An iPhone that runs at least iOS 17 Find out more here: https://ham-radio-apps.com Read the Manual: http://go-to.me/sdrcontrol-mobile-manual

About

Hidden Room

Securely store sensitive contacts with advanced privacy features. This app offers encrypted storage, masked fields, and automatic locking to protect your personal and professional information.

Highlights
  • Encrypted contact storage
  • Masked contact fields
  • Automatic app locking
  • Optional Face ID/shuffled passcode
  • Emergency erase function
  • Automatic contact deletion
Read full description

Some contacts deserve more privacy than a standard address book can provide. Hidden Room keeps sensitive personal and professional contacts in a separate encrypted vault on your iPhone. Made for journalists, advocates, travelers, people who share a device, and anyone who wants selected contacts kept out of ordinary view. What Hidden Room does • You enter contacts manually; Hidden Room never imports iPhone Contacts. • Names and details stay masked until you press and hold to reveal them. • Store phone numbers, email and postal addresses, websites, and messaging IDs. • The vault locks when you leave the app or after your chosen idle time. • Face ID and keypad randomization are optional. • Screen recording hides revealed details. A screenshot immediately locks the app when Screenshot Lock is enabled. Sharing starts off. If you enable it, Hidden Room asks before copying details or opening another app and locks before handing information over. Clipboard entries expire after 30 seconds and clear when Hidden Room locks. Deletion stays in your control. Emergency Erase uses a deliberate final hold. Optional automatic deletion can reset the vault after repeated wrong codes or a chosen time without a successful unlock. These settings are off by default and clearly warn you before activation. Hidden Room has no account, ads, analytics, tracking, cloud sync, or third-party SDKs. Vault data is encrypted, stored only on this iPhone, and excluded from backups. The developer cannot view or recover your contacts or app code. Hidden Room adds privacy, but cannot make an iPhone anonymous or guarantee personal safety. Information copied or opened outside Hidden Room may remain in messages, calls, email, notifications, histories, backups, cloud services, recipient devices, or other apps. There is no app-code recovery or cloud backup. Hidden Room is free. Optional one-time tips support development. Tips unlock nothing, start no subscription, and are processed by Apple.

Screenshots

SDR4 screens
Hidden Room4 screens

Verdict

The call

The clearest difference is price: Hidden Room at Free against SDR's $44.99. Hidden Room also leads on rating (5.0 vs 4.5). SDR's advantage is in-app purchases (none vs 3) and ratings volume (64 vs 1). On update cadence, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Hidden Room is free to download; SDR costs $44.99 up front. Hidden Room sells 3 one-off in-app purchases. SDR asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Hidden Room holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: SDR has 64 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 20, 2026 and October 12, 2026 respectively.

Scorecard6 real differences · 5 level
SDR versus Hidden Room: the parameters behind the verdict, then further details
ParameterSDRHidden Room
Price$44.99Free — better
Rating4.5 (64 ratings)5.0 (1 ratings) — better
Positive reviews84.1% of reviews—
Number of ratings64 — better1
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#187 — better—
DevicesiPhoneiPhone
Requires iOS17.6 — better18.0
Further details — not scored
Size47 MB12 MB
Age rating4+4+
DeveloperMarcus RoskoschKaleidosky Studio LLC

Customer experience

SDR

All ratings64 ratings
Positive89.1%
Neutral0.0%
Negative10.9%
Written reviews69 reviews
Positive84.1%
Neutral5.8%
Negative10.1%

Hidden Room

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

SDR

Reported bugs

12 issues
  • Dialogs do not scale with larger text setting
  • Frequency display overlaps buttons
  • FT8 decoding issues (lower signal levels than WSJTX)
  • App crashes and leaves radio in transmit
  • Logbook export not functional after update
Show 7 more
  • Function button for horizontal scrolling not fully displayed
  • FT8 decode is useless and unreliable
  • Messed up radio, requiring reset
  • RX audio unusable outside home network (prior to 1.5.1)
  • Struggles with audio RX packets on remote cellular networks
  • Cannot work over mobile data with certain carriers (EE)
  • FT8 alerts sound but don't display

Requested features

14 requests
  • Develop for IC-7800
  • CarPlay support
  • Apple Watch add-on
  • Windows version
  • JS8call support
Show 9 more
  • More digital modes
  • Display memory bank names
  • Initiate memory scan from app
  • WSPR implementation
  • Tool for WSPR
  • More FT8/FT4 features (e.g., setting transmit frequency directly in FT8 view)
  • Send image to unit
  • KISS TNC support
  • Control digital modes (reflectors, etc.)

Hidden Room

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

SDR

No in-app purchases

3 purchases

Hidden Room

One-time3
  • Small Tip$1.99
  • Medium Tip$9.99
  • Large Tip$99.99

Questions

Is SDR free?
SDR costs $44.99, with no in-app purchases.
Is Hidden Room free?
Hidden Room is free to download, with in-app purchases available.
Which has better reviews, SDR or Hidden Room?
Hidden Room is rated higher. SDR averages 4.5 out of 5 from 64 ratings, while Hidden Room averages 5.0 from 1 ratings.
Do SDR or Hidden Room have ads?
Neither SDR nor Hidden Room shows ads.
Which is updated more often, SDR or Hidden Room?
SDR ships an update every 2 weeks, and Hidden Room every 2 weeks. Most recently, SDR was updated on October 20, 2026 and Hidden Room on October 12, 2026.

Other comparisons