# Spectroscope vs Call Shield

The clearest difference is price: Call Shield at $1.99 against Spectroscope's $14.99. Spectroscope's advantage is update cadence (every 5 days vs fortnightly) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Spectroscope costs $14.99 and Call Shield $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Spectroscope ships an update every 5 days, Call Shield fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Spectroscope | Call Shield |
| --- | --- | --- |
| Price | $14.99 | **$1.99** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/call-shield-spam-call-blocker/id6744029271/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | — | Paid |
| Size | 25 MB | 35 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [LEONARDO TAZZINI](https://appshunter.io/developer/1751785749) | [磊 汪](https://appshunter.io/developer/1063627762) |

## What reviewers say

### Spectroscope

[App page](https://appshunter.io/ios/app/spectroscope/id6741684078)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Call Shield

[App page](https://appshunter.io/ios/app/call-shield-spam-call-blocker/id6744029271)

Take control of your incoming calls with this app. It blocks unwanted callers, including robocallers and telemarketers, using a secure, local blocklist that operates entirely on your device. Enjoy privacy protection with offline functionality and no required login.

**Highlights:** Block unwanted calls, Block number ranges (prefixes), Offline functionality, No login required, Local device blocklist, Supports millions of blocked numbers

**In-app purchases:** none


## Frequently asked questions

### Is Spectroscope free?

Spectroscope costs $14.99, with no in-app purchases.

### Is Call Shield free?

Call Shield costs $1.99, with no in-app purchases.

### Do Spectroscope or Call Shield have ads?

Neither Spectroscope nor Call Shield shows ads.

### Which is updated more often, Spectroscope or Call Shield?

Spectroscope ships an update every 5 days, and Call Shield fortnightly. Most recently, Spectroscope was updated on October 25, 2026 and Call Shield on October 24, 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.*