# Ruler vs UB Trainer Session

The clearest difference is in-app purchases: UB Trainer Session at none against Ruler's 7. Ruler's advantage is ads (none vs shown) and update cadence (every 2 days vs every 10 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Ruler sells 7 in-app purchases, starting at $2.99 per 7 days. UB Trainer Session asks for nothing beyond the download.

Ruler ships an update every 2 days, UB Trainer Session every 10 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ruler | UB Trainer Session |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ruler-measuring-tape/id6754293314/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 10 days |
| Monetization | Subscription | — |
| Size | 27 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Myroslav Drozd](https://appshunter.io/developer/1847677489) | [Michaela Klein](https://appshunter.io/developer/1895006945) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-measuring-tape/id6754293314)

Transform your phone into a precise measuring tool. Accurately measure objects, surfaces, and distances using your screen or camera. Ideal for home, work, or on-the-go tasks, providing quick and reliable measurements.

**Highlights:** Measure objects on screen, Switch between units (cm, mm, inches), Save and share measurements, Easy-to-use interface, Accurate and fast measurements

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smart Ruler | $2.99 | per 7 days |
| Smart Ruler | $4.99 | per 7 days |
| Smart Ruler | $6.99 | per 7 days |
| Smart Ruler | $9.99 | per year |
| Smart Ruler | $14.99 | per year |
| Smart Ruler | $19.99 | per year |
| Smart Ruler | $24.99 | per year |


### UB Trainer Session

[App page](https://appshunter.io/ios/app/ub-trainer-session/id6813386061)

**In-app purchases:** none


## Frequently asked questions

### Is Ruler free?

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

### Is UB Trainer Session free?

UB Trainer Session is free to download, with no in-app purchases.

### Do Ruler or UB Trainer Session have ads?

UB Trainer Session shows ads; Ruler does not.

### Which is updated more often, Ruler or UB Trainer Session?

Ruler ships an update every 2 days, and UB Trainer Session every 10 days. Most recently, Ruler was updated on October 30, 2026 and UB Trainer Session 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.*