# Spirit Level Plus vs Surface Tech AI

The clearest difference is in-app purchases: Surface Tech AI at none against Spirit Level Plus's 1. Surface Tech AI also leads on update cadence (every 3 weeks vs every 6 months) and rating (5.0 vs 4.6). Spirit Level Plus's advantage is ratings volume (2.3K vs 1) and iOS requirement (10.3 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Spirit Level Plus sells 1 one-off in-app purchase. Surface Tech AI asks for nothing beyond the download.

Surface Tech AI holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Spirit Level Plus has 2.3K ratings behind it against 1, so its average is the more settled of the two.

Spirit Level Plus ships an update every 6 months, Surface Tech AI every 3 weeks. The most recent releases landed on September 27, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Spirit Level Plus | Surface Tech AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (2.3K ratings)](https://appshunter.io/ios/app/spirit-level-plus/id635314551/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/surface-tech-ai/id6756556487/reviews)** |
| Number of ratings | **2.3K** | 1 |
| Positive reviews | 23.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 26 MB | 32 MB |
| Requires iOS | **10.3** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [SURFACE TECH LLC](https://appshunter.io/developer/1359208725) |

## What reviewers say

### Spirit Level Plus

[App page](https://appshunter.io/ios/app/spirit-level-plus/id635314551)

This app transforms your iPhone into a precise spirit level. It's ideal for various tasks including carpentry, home decoration, and measuring angles and slopes.

**Highlights:** Precise spirit level, Angle measurement, Slope measurement, Carpentry works, Home decoration

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tubular Level | $0.99 | one-time |

**What reviewers like**

- 🚀 Useful tool
- 👍 Handy for RVs and campers
- 👍 Accurate and reliable readings

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🔒 Paywall for basic functionality
- 🔋 High battery consumption
- 👎 Overly aggressive monetization

**Reported bugs**

- Incompatibility with iOS 8.1
- Frequent timeouts and resets

**Requested features**

- Horizontal and vertical level display
- Calibration options
- More customization settings


### Surface Tech AI

[App page](https://appshunter.io/ios/app/surface-tech-ai/id6756556487)

This AI-powered workspace consolidates conversations, documents, and business tools into a secure platform. It allows users to ask questions in natural language and receive instant, accurate answers, while also generating professional content and integrating with CRM systems.

**Highlights:** AI-powered natural language queries, Document intelligence and semantic search, Automated content generation (emails, reports), CRM system integration, Knowledge base creation from conversations, Secure, role-based access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spirit Level Plus free?

Spirit Level Plus is free to download, with in-app purchases available.

### Is Surface Tech AI free?

Surface Tech AI is free to download, with no in-app purchases.

### Which has better reviews, Spirit Level Plus or Surface Tech AI?

Surface Tech AI is rated higher. Spirit Level Plus averages 4.6 out of 5 from 2.3K ratings, while Surface Tech AI averages 5.0 from 1 ratings.

### Do Spirit Level Plus or Surface Tech AI have ads?

Neither Spirit Level Plus nor Surface Tech AI shows ads.

### Which is updated more often, Spirit Level Plus or Surface Tech AI?

Spirit Level Plus ships an update every 6 months, and Surface Tech AI every 3 weeks. Most recently, Spirit Level Plus was updated on September 27, 2026 and Surface Tech AI on September 10, 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.*