# i vs Tumbler Timer Pro

The clearest difference is price: i at Free against Tumbler Timer Pro's $0.99. i also leads on ratings volume (35 vs 1) and iOS requirement (16.0 vs 26.0). Tumbler Timer Pro's advantage is rating (5.0 vs 2.7) and update cadence (every 2 weeks vs every 14 months). On ads, in-app purchases and device support there is nothing between them.

i is free to download; Tumbler Timer Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tumbler Timer Pro holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: i has 35 ratings behind it against 1, so its average is the more settled of the two.

i ships an update every 14 months, Tumbler Timer Pro every 2 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | i | Tumbler Timer Pro |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [2.7 (35 ratings)](https://appshunter.io/ios/app/i-seeing/id926099814/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tumbler-timer-pro/id6757316827/reviews)** |
| Number of ratings | **35** | 1 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 6 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Qingying Electronic Technology LLC](https://appshunter.io/developer/926099802) | [Scott Manley](https://appshunter.io/developer/1864388985) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-seeing/id926099814)

Transform your smartphone into a powerful magnification tool. Observe and record microscopic details with your phone's camera and a macro lens. Measure objects with a scale bar and add notes to your digital micrographs.

**Highlights:** Professional magnification tool, Record digital micrographs, Optical magnification, Up to 10x digital zoom, Scale bar for measurement, Add notes and remarks, Direct photo sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### Tumbler Timer Pro

[App page](https://appshunter.io/ios/app/tumbler-timer-pro/id6757316827)

This app helps rock tumbling enthusiasts manage their batches from start to finish. It allows users to track progress, set custom durations, and receive notifications for stage completion. Includes a rock identification guide and lifetime statistics.

**Highlights:** Smart batch tracking, Flexible stage management, Multi-tumbler support, Stage completion notifications, Rock identification guide, Lifetime statistics tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is i free?

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

### Is Tumbler Timer Pro free?

Tumbler Timer Pro costs $0.99, with no in-app purchases.

### Which has better reviews, i or Tumbler Timer Pro?

Tumbler Timer Pro is rated higher. i averages 2.7 out of 5 from 35 ratings, while Tumbler Timer Pro averages 5.0 from 1 ratings.

### Do i or Tumbler Timer Pro have ads?

Neither i nor Tumbler Timer Pro shows ads.

### Which is updated more often, i or Tumbler Timer Pro?

i ships an update every 14 months, and Tumbler Timer Pro every 2 weeks. Most recently, i was updated on November 1, 2026 and Tumbler Timer Pro 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.*