# imp™ vs Digicard Key

The clearest difference is ads: imp™ at none against Digicard Key's shown. imp™ also leads on monetization model (free vs ad-supported) and update cadence (every 2 months vs every 4 months). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for imp™ against 5.0 for Digicard Key. That said, the two scores are not equally well evidenced: imp™ has 12 ratings behind it against 2, so its average is the more settled of the two.

imp™ ships an update every 2 months, Digicard Key every 4 months. The most recent releases landed on June 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | imp™ | Digicard Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (12 ratings)](https://appshunter.io/ios/app/imp-imp-box-controller/id1509443801/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/digicard-key/id1610779653/reviews) |
| Number of ratings | **12** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 36 MB | 33 MB |
| Requires iOS | **12.1** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Its My Phone, Inc](https://appshunter.io/developer/1509443800) | [Digicard Key LLC](https://appshunter.io/developer/1610779655) |

## What reviewers say

### imp™

[App page](https://appshunter.io/ios/app/imp-imp-box-controller/id1509443801)

This app works with a smart home device to filter unwanted landline calls, allowing only desired contacts to reach you. It also functions as a remote answering machine for your landline, letting you manage voicemails from anywhere.

**Highlights:** Real-time call filtering, Greenlist Technology™, Syncs iPhone contacts, Remote voicemail access, Do Not Disturb mode, Invite others to landline

**In-app purchases:** none


### Digicard Key

[App page](https://appshunter.io/ios/app/digicard-key/id1610779653)

Verify the authenticity of tagged items by scanning NFC tags. Access detailed information, origin, and ownership history stored on a blockchain. Claim ownership of items and ensure their provenance.

**Highlights:** Scan NFC tags, Verify item authenticity, View item information and history, Claim item ownership, Blockchain-recorded data, Supply chain verification

**In-app purchases:** none


## Frequently asked questions

### Is imp™ free?

imp™ is free to download, with no in-app purchases.

### Is Digicard Key free?

Digicard Key is free to download, with no in-app purchases.

### Which has better reviews, imp™ or Digicard Key?

imp™ and Digicard Key are both rated 5.0 out of 5 on the App Store, from 12 and 2 ratings respectively.

### Do imp™ or Digicard Key have ads?

Digicard Key shows ads; imp™ does not.

### Which is updated more often, imp™ or Digicard Key?

imp™ ships an update every 2 months, and Digicard Key every 4 months. Most recently, imp™ was updated on June 3, 2026 and Digicard Key on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*