# PSI Solarcell vs MobMai

The clearest difference is in-app purchases: PSI Solarcell at none against MobMai's 2. MobMai's advantage is ads (none vs shown) and device support (4 vs 2). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. MobMai sells 2 in-app purchases, starting at $5.99 per month. PSI Solarcell asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | PSI Solarcell | MobMai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | Every 3 days |
| Size | 73 MB | 36 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [psicorporation](https://appshunter.io/developer/1829887656) | [THAM APP COMPANY LIMITED](https://appshunter.io/developer/1792239529) |

## What reviewers say

### PSI Solarcell

[App page](https://appshunter.io/ios/app/psi-solarcell/id6751521488)

**Features:** macOS Compatibility

**In-app purchases:** none


### MobMai

[App page](https://appshunter.io/ios/app/mobmai-to-do-task-team-work/id6755966452)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MobMai To Do Pro Package - Monthly | $5.99 | per month |
| MobMai To Do Pro Package - Yearly | $34.99 | per year |


## Frequently asked questions

### Is PSI Solarcell free?

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

### Is MobMai free?

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

### Do PSI Solarcell or MobMai have ads?

PSI Solarcell shows ads; MobMai does not.

### Which is updated more often, PSI Solarcell or MobMai?

PSI Solarcell ships an update every 3 days, and MobMai every 3 days. Most recently, PSI Solarcell was updated on October 30, 2026 and MobMai 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.*