# Altimeter vs SmsLLM

The clearest difference is update cadence: SmsLLM at every 10 days against Altimeter's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Altimeter sells 3 in-app purchases, starting at $2.99 per 7 days and SmsLLM sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Altimeter ships an update every 4 weeks, SmsLLM every 10 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Altimeter | SmsLLM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 10 days** |
| Size | 8 MB | 1 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [金龙 彭](https://appshunter.io/developer/1664079579) |

## What reviewers say

### Altimeter

[App page](https://appshunter.io/ios/app/altimeter-gps-elevation/id6772261844)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Climb Log: Weekly | $2.99 | per 7 days |
| Summit Height: Yearly | $14.99 | per year |
| Offline Altitude: Pay Once | $29.99 | one-time |


### SmsLLM

[App page](https://appshunter.io/ios/app/smsllm-llm-sms-blocker/id6781108848)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmsLLM Pro Monthly | $2.99 | per month |
| SmsLLM Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Altimeter free?

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

### Is SmsLLM free?

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

### Do Altimeter or SmsLLM have ads?

Neither Altimeter nor SmsLLM shows ads.

### Which is updated more often, Altimeter or SmsLLM?

Altimeter ships an update every 4 weeks, and SmsLLM every 10 days. Most recently, Altimeter was updated on October 31, 2026 and SmsLLM on November 5, 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.*