A free app download does not mean every optional feature is free, and it does not tell you which functions your device needs. For the QIUI models in the app-controlled collection, separate the hardware purchase from the app’s current in-app purchase listings. Then confirm whether the features you intend to use require any extra payment in your region.
Separate the device price from the app listing
The US Apple App Store entry for QIUI said “Free · In-App Purchases” when checked on October 12, 2026. “Free” describes downloading that iPhone app, not the cost of a QIUI cage or key box. The second phrase says purchases are offered inside the app; it does not tell us that a particular device’s essential controls require one. App availability, purchases and terms can change by country and account.
Begin with two columns: hardware price for the exact selected product, and the app features you intend to use. Keep optional key boxes, replacement parts and connection charges as separate lines. The existing smart-cage buying guide helps define a device shortlist before assessing app costs.
Which features your chosen model actually needs
ThrillCage lists app-controlled E-Stim and vibration with a physical-key lock. Metal KeyPod is a separate key-storage box with app access and a listed offline timer. MetalShake lists app-controlled locking and vibration. These are three different uses of an app, so a general app-store price label cannot answer what each one costs to operate.
For each selected device, identify the function you plan to use and the exact app screen or official instruction that governs it. If the page or current app listing does not specify whether that function is free, paid once, or tied to a renewal, mark the answer unverified. Do not buy an add-on merely because the store lists in-app purchases; do not assume a feature is free for life because the download is free.
QIUI ThrillCage App-Controlled E-Stim Chastity Cage
ThrillCage is the dual E-Stim-and-vibration hardware example, with a physical-key lock and optional separate KeyPod. The free iPhone app download does not establish whether every optional function for this model is free; check the current model-specific terms. See the product details and select the exact option before ordering.
Free download and optional purchases are different
The App Store’s “Free · In-App Purchases” label establishes a free download and the availability of in-app transactions on the US iPhone listing. It does not identify which purchase, if any, you need for ThrillCage stimulation controls, KeyPod access or MetalShake locking. The app may present multiple products and optional services. Only a current model-specific source or a pre-purchase answer from the seller can resolve that mapping.
A hardware accessory is different again. A KeyPod is not an in-app purchase just because it uses the QIUI app; it is a separate physical product. Similarly, an app subscription mentioned on a general screen should not be assigned to a cage feature without evidence.
QIUI Metal KeyPod App-Controlled Key Lock Box with Timer
Metal KeyPod is a separately purchased metal key box, not a digital add-on to the ThrillCage listing. Its app access and offline timer are listed, but exact app charges and timer conditions must be checked for this model and region. See the product details and select the exact option before ordering.
Check region, platform and renewal terms
Confirm that the app is offered for the phone platform and region you will use. The checked Apple listing is for iPhone in the US store. It is not evidence of the Android listing, Android feature set, or prices in another country; those require separate current checks. Before paying for any in-app item, read its checkout screen for price, billing period, renewal and cancellation terms.
If remote use depends on mobile data or another connection, confirm the product’s actual connection design and any carrier costs separately. A free app download does not make data service free, and a Bluetooth connection cannot be assumed to work over the internet without a documented relay path.
A cost checklist for three QIUI devices
Use the same checklist for each device without filling unknown entries with guesses:
| Device | Hardware purchase | Listed app-controlled role | Extra payment to verify |
|---|---|---|---|
| ThrillCage | Selected cage; KeyPod separate | E-Stim and vibration | Any optional app feature used by your plan |
| Metal KeyPod | Separate metal key box | Access to stored key; offline timer listed | Any app service attached to your chosen routine |
| MetalShake | Selected cage | Locking and vibration | Any paid function for this exact model |
Record the date and region of each price check. An absent fee statement is “not verified,” not a promise of zero cost. We did not buy, log in to test paid flows, or verify Android in making this comparison.
QIUI CAGINK MetalShake App-Controlled Metal Vibrating Chastity Cage
MetalShake illustrates a different app role: its listing names electronic locking and vibration. Do not transfer a ThrillCage payment assumption to it, and confirm the exact low-battery and early-release instructions before purchase. See the product details and select the exact option before ordering.
The reliable answer is narrow: the checked US iPhone QIUI download is free and offers in-app purchases. Whether your selected device and intended function require payment remains a model- and region-specific check.