# Zoho Spatial Designer vs Lumo AI by Proton

The clearest difference is in-app purchases: Zoho Spatial Designer at none against Lumo AI by Proton's 2. Lumo AI by Proton's advantage is update cadence (every 11 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Lumo AI by Proton sells 2 in-app purchases, starting at $12.99 per month. Zoho Spatial Designer asks for nothing beyond the download.

Zoho Spatial Designer ships an update every 5 months, Lumo AI by Proton every 11 days. The most recent releases landed on October 9, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Zoho Spatial Designer | Lumo AI by Proton |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.9 (557 ratings)](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949/reviews)** |
| Number of ratings | — | **557** |
| Positive reviews | — | 45.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | — | Free with in-app purchases |
| Size | 167 MB | 103 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, Vision Pro | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zoho Corporation](https://appshunter.io/developer/388384807) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### Zoho Spatial Designer

[App page](https://appshunter.io/ios/app/zoho-spatial-designer/id6503129679)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lumo AI by Proton

[App page](https://appshunter.io/ios/app/lumo-ai-by-proton/id6746714949)

This AI assistant prioritizes your privacy, offering help with productivity, curiosity, and staying informed. Developed by the team behind trusted encrypted services, it ensures your data remains secure.

**Highlights:** Privacy-first AI assistant, Boost productivity, Satisfy curiosity, Stay informed, Secure data handling

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lumo Plus (1 month) | $12.99 | per month |
| Lumo Plus (12 months) | $119.99 | per year |

**What reviewers like**

- 👍 Sophisticated knowledge base
- 🚀 Rapid evolution with quality
- 💡 Potential for vision-enabled model

**What reviewers complain about**

- 🐛 Inability to answer basic questions
- 🔒 Privacy concerns with data processing
- 🐛 Inconsistent responses
- 🐛 Frequent sign-outs
- 🐛 Dark mode issues

**Reported bugs**

- Slow sign-in page
- Lack of real-time data access

**Requested features**

- Dynamic Type support for adjustable font size
- Secure access to Proton Drive files
- Ghost mode to ensure no chat history is saved
- Intuitive history clearing option
- App mode


## Frequently asked questions

### Is Zoho Spatial Designer free?

Zoho Spatial Designer is free to download, with no in-app purchases.

### Is Lumo AI by Proton free?

Lumo AI by Proton is free to download, with in-app purchases available.

### Do Zoho Spatial Designer or Lumo AI by Proton have ads?

Neither Zoho Spatial Designer nor Lumo AI by Proton shows ads.

### Which is updated more often, Zoho Spatial Designer or Lumo AI by Proton?

Zoho Spatial Designer ships an update every 5 months, and Lumo AI by Proton every 11 days. Most recently, Zoho Spatial Designer was updated on October 9, 2026 and Lumo AI by Proton 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.*