# PrefixPlus vs Simply Filter SMS

The clearest difference is in-app purchases: PrefixPlus at none against Simply Filter SMS's 3. PrefixPlus also leads on rating (4.7 vs 4.4) and ratings volume (1.1K vs 69). Simply Filter SMS's advantage is ads (none vs shown) and update cadence (every 9 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Simply Filter SMS sells 3 one-off in-app purchases. PrefixPlus asks for nothing beyond the download.

PrefixPlus holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: PrefixPlus has 1.1K ratings behind it against 69, so its average is the more settled of the two. Written reviews complicate that: 72% of PrefixPlus's written reviews are positive against 81% of Simply Filter SMS's, so the app with the better star average is not the one people write more warmly about.

PrefixPlus ships an update every 2 months, Simply Filter SMS every 9 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | PrefixPlus | Simply Filter SMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/prefixplus-add-the-prefix/id1142430837/reviews)** | [4.4 (69 ratings)](https://appshunter.io/ios/app/simply-filter-sms/id1603222959/reviews) |
| Number of ratings | **1.1K** | 69 |
| Positive reviews | 71.8% of reviews | **80.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 8 MB | 8 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [yasuhiko nagahara](https://appshunter.io/developer/1142430836) | [Adi Ben-Dahan](https://appshunter.io/developer/1603222961) |

## What reviewers say

### PrefixPlus

[App page](https://appshunter.io/ios/app/prefixplus-add-the-prefix/id1142430837)

Easily add international or custom prefixes to all your phone numbers in contacts simultaneously. This utility helps manage multiple contact entries for different calling regions without overwriting existing numbers. Ensure you back up your contacts before use.

**Highlights:** Add prefixes to multiple contacts at once, Does not overwrite existing numbers, Customizable prefix numbers, Customizable label for new entries, Supports iCloud and Gmail synchronized contacts

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Allows adding prefix numbers to contacts
- 🚀 Efficient batch update of contacts
- 👍 Convenient for users of MVNO services
- 👍 Integrates well with default phone app

**What reviewers complain about**

- 🐛 Crashes or freezes when updating contacts
- 🐛 Inconsistent or incomplete contact updates
- 🔋 Potential for increased data usage or charges

**Reported bugs**

- Crashes on iOS 13.3
- Duplicate contact entries created
- Prefix not applied to all contacts

**Requested features**

- Option to add space between prefix and number
- Support for local/offline contacts
- Ability to selectively update contacts


### Simply Filter SMS

[App page](https://appshunter.io/ios/app/simply-filter-sms/id1603222959)

This app automatically filters unwanted text messages on your iPhone or iPad. It uses AI and customizable rules to sort messages from unknown senders into categories like Junk, Promotions, or Transactions, all processed on your device for privacy.

**Highlights:** AI-powered spam filtering, Customizable keyword rules, Automatic message categorization, On-device processing for privacy, Support for 10 languages, Trusted country filtering

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


## Frequently asked questions

### Is PrefixPlus free?

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

### Is Simply Filter SMS free?

Simply Filter SMS is free to download, with in-app purchases available.

### Which has better reviews, PrefixPlus or Simply Filter SMS?

PrefixPlus is rated higher. PrefixPlus averages 4.7 out of 5 from 1.1K ratings, while Simply Filter SMS averages 4.4 from 69 ratings.

### Do PrefixPlus or Simply Filter SMS have ads?

PrefixPlus shows ads; Simply Filter SMS does not.

### Which is updated more often, PrefixPlus or Simply Filter SMS?

PrefixPlus ships an update every 2 months, and Simply Filter SMS every 9 days. Most recently, PrefixPlus was updated on October 24, 2026 and Simply Filter SMS on October 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.*