# [sip] Mobile vs Topmost

The clearest difference is in-app purchases: [sip] Mobile at none against Topmost's 2. [sip] Mobile also leads on iOS requirement (15.0 vs 18.0). Topmost's advantage is update cadence (every 3 days vs every 3 weeks) and device support (5 vs 3). On price and ads there is nothing between them.

Both are free to download. Topmost sells 2 in-app purchases, starting at $2.99 per year. [sip] Mobile asks for nothing beyond the download.

[sip] Mobile ships an update every 3 weeks, Topmost every 3 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | [sip] Mobile | Topmost |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 130 MB | 25 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [ISOware GmbH](https://appshunter.io/developer/1489335403) | [Dares Core d.o.o.](https://appshunter.io/developer/1609870319) |

## What reviewers say

### [sip] Mobile

[App page](https://appshunter.io/ios/app/sip-mobile-client/id1489335404)

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

**In-app purchases:** none


### Topmost

[App page](https://appshunter.io/ios/app/topmost-simplest-to-do-list/id6780478586)

**Features:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Topmost Plus | $2.99 | per year |
| Topmost Plus | $8.99 | one-time |


## Frequently asked questions

### Is [sip] Mobile free?

[sip] Mobile is free to download, with no in-app purchases.

### Is Topmost free?

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

### Do [sip] Mobile or Topmost have ads?

Neither [sip] Mobile nor Topmost shows ads.

### Which is updated more often, [sip] Mobile or Topmost?

[sip] Mobile ships an update every 3 weeks, and Topmost every 3 days. Most recently, [sip] Mobile was updated on October 25, 2026 and Topmost 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.*