# Silent Flash Timer vs Fermi Practice Drill with AI

Silent Flash Timer and Fermi Practice Drill with AI are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Silent Flash Timer sells 4 in-app purchases, starting at $0.99 per month and Fermi Practice Drill with AI sells 1 in-app purchase, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Silent Flash Timer | Fermi Practice Drill with AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (20 ratings)](https://appshunter.io/ios/app/silent-flash-timer-no-sound/id6449392949/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 21 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NEUDESIGNLAB, LLC](https://appshunter.io/developer/1688874872) | [Yuto Inagaki](https://appshunter.io/developer/1733484400) |

## What reviewers say

### Silent Flash Timer

[App page](https://appshunter.io/ios/app/silent-flash-timer-no-sound/id6449392949)

This app provides a silent timer that uses screen flashes for notifications instead of sound or vibration. It's ideal for focused work, quiet environments like libraries, or for users sensitive to auditory alerts, ensuring time management without disruption.

**Highlights:** Screen flash notifications, No sound or vibration alerts, Ideal for focused work, Suitable for quiet environments, User-friendly interface, Supports time management

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Plan | $0.99 | per month |
| Premium - Yearly | $4.99 | per year |
| Lifetime Ad Removal Discounted | $5.99 | one-time |
| Lifetime Ad Removal | $9.99 | one-time |


### Fermi Practice Drill with AI

[App page](https://appshunter.io/ios/app/fermi-practice-drill-with-ai/id6748893807)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FerminPro | $5.99 | per month |


## Frequently asked questions

### Is Silent Flash Timer free?

Silent Flash Timer is free to download, with in-app purchases available.

### Is Fermi Practice Drill with AI free?

Fermi Practice Drill with AI is free to download, with in-app purchases available.

### Do Silent Flash Timer or Fermi Practice Drill with AI have ads?

Both Silent Flash Timer and Fermi Practice Drill with AI show ads.

### Which is updated more often, Silent Flash Timer or Fermi Practice Drill with AI?

Silent Flash Timer ships an update every 2 weeks, and Fermi Practice Drill with AI every 2 weeks. Most recently, Silent Flash Timer was updated on November 3, 2026 and Fermi Practice Drill with AI 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.*