# SMS Antispammer vs Amazing Future Letters

The clearest difference is price: Amazing Future Letters at Free against SMS Antispammer's $1.99. Amazing Future Letters also leads on update cadence (every 3 days vs every 38 months). SMS Antispammer's advantage is iOS requirement (14.0 vs 17). On ads, in-app purchases and device support there is nothing between them.

Amazing Future Letters is free to download; SMS Antispammer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SMS Antispammer ships an update every 38 months, Amazing Future Letters every 3 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SMS Antispammer | Amazing Future Letters |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (25 ratings)](https://appshunter.io/ios/app/amazing-future-letters/id6764042323/reviews)** |
| Number of ratings | — | **25** |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 days** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 5 MB |
| Requires iOS | **14.0** | 17 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Space In Box](https://appshunter.io/developer/486967606) | [Elowen Prynn](https://appshunter.io/developer/1895609802) |

## What reviewers say

### SMS Antispammer

[App page](https://appshunter.io/ios/app/sms-antispammer/id1295095396)

Block unwanted SMS messages by filtering them based on custom keywords. Once activated, these messages are automatically moved to a spam folder, ensuring you won't receive notifications. Filtering is performed directly on your device for enhanced privacy.

**Highlights:** SMS filtering by keywords, Editable keyword list, Messages hidden in spam section, No notifications for filtered messages, Local filtering on device

**Features:** macOS Compatibility

**In-app purchases:** none


### Amazing Future Letters

[App page](https://appshunter.io/ios/app/amazing-future-letters/id6764042323)

This app guides you through a structured reflection process to aid decision-making. Write four letters to your future self from different perspectives, then lock them for an hour to gain distance and clarity before making a final choice.

**Highlights:** Structured reflection process, Write letters to future self, Four distinct perspectives, Timed lock for reflection, Decision finalization, Post-decision reflection

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

**In-app purchases:** none


## Frequently asked questions

### Is SMS Antispammer free?

SMS Antispammer costs $1.99, with no in-app purchases.

### Is Amazing Future Letters free?

Amazing Future Letters is free to download, with no in-app purchases.

### Do SMS Antispammer or Amazing Future Letters have ads?

Neither SMS Antispammer nor Amazing Future Letters shows ads.

### Which is updated more often, SMS Antispammer or Amazing Future Letters?

SMS Antispammer ships an update every 38 months, and Amazing Future Letters every 3 days. Most recently, SMS Antispammer was updated on November 6, 2026 and Amazing Future Letters on October 31, 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.*