# Robo Call Revenge vs Piper Inventory

The clearest difference is review sentiment: Piper Inventory at 100% against Robo Call Revenge's 0%. Piper Inventory also leads on price (Free vs $0.99) and rating (3.7 vs 1.0). Robo Call Revenge's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Piper Inventory is free to download; Robo Call Revenge costs $0.99 up front. Piper Inventory sells 2 in-app purchases, starting at $22.00 per month. Robo Call Revenge asks for nothing beyond the download.

Piper Inventory holds the better App Store score, 3.7 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 0% of Robo Call Revenge's written reviews are positive against 100% of Piper Inventory's.

Robo Call Revenge ships an update every 43 months, Piper Inventory every 6 months. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Robo Call Revenge | Piper Inventory |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/robo-call-revenge/id1585642381/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/piper-inventory/id6469746367/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 6 months** |
| Monetization | **Paid** | Subscription |
| Size | 44 MB | 17 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dan Johnson](https://appshunter.io/developer/334217078) | [Piper Diagnostics LLC](https://appshunter.io/developer/1712591819) |

## What reviewers say

### Robo Call Revenge

[App page](https://appshunter.io/ios/app/robo-call-revenge/id1585642381)

This app allows you to respond to unwanted robo calls by speaking pre-programmed phrases. Customize your responses in the settings and activate them from the main screen to engage with telemarketers.

**Highlights:** Respond to robo calls, Speak custom phrases, Phrase customization, Engage with telemarketers, Settings screen for phrases

**Features:** macOS Compatibility

**In-app purchases:** none


### Piper Inventory

[App page](https://appshunter.io/ios/app/piper-inventory/id6469746367)

Manage your warehouse or mobile workstation inventory on the go. Easily add items, set minimum quantities, and use a Bluetooth barcode scanner to track stock. Syncs between devices for collaboration and generates restock lists.

**Highlights:** On-the-go inventory management, Bluetooth barcode scanner support, Set minimum stock quantities, Restock list generation, Inventory history tracking, Multi-location account management, Spreadsheet upload for setup

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $22.00 | per month |
| Annual | $199.00 | per year |


## Frequently asked questions

### Is Robo Call Revenge free?

Robo Call Revenge costs $0.99, with no in-app purchases.

### Is Piper Inventory free?

Piper Inventory is free to download, with in-app purchases available.

### Which has better reviews, Robo Call Revenge or Piper Inventory?

Piper Inventory is rated higher. Robo Call Revenge averages 1.0 out of 5 from 1 ratings, while Piper Inventory averages 3.7 from 3 ratings.

### Do Robo Call Revenge or Piper Inventory have ads?

Neither Robo Call Revenge nor Piper Inventory shows ads.

### Which is updated more often, Robo Call Revenge or Piper Inventory?

Robo Call Revenge ships an update every 43 months, and Piper Inventory every 6 months. Most recently, Robo Call Revenge was updated on October 12, 2026 and Piper Inventory on October 3, 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.*