# BatteryNow ! Big Digital Clock vs Sumi

The clearest difference is in-app purchases: BatteryNow ! Big Digital Clock at none against Sumi's 2. Sumi's advantage is ads (none vs shown) and update cadence (every 3 days vs every 9 months). On price and iOS requirement there is nothing between them.

Both are free to download. Sumi sells 2 one-off in-app purchases. BatteryNow ! Big Digital Clock asks for nothing beyond the download.

BatteryNow ! Big Digital Clock ships an update every 9 months, Sumi every 3 days. The most recent releases landed on November 1, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | BatteryNow ! Big Digital Clock | Sumi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/batterynow-big-digital-clock/id622404130/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 9 MB | 11 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [kazuhiko kuroda](https://appshunter.io/developer/460872954) | [Sigit Kuncoro](https://appshunter.io/developer/1889728747) |

## What reviewers say

### BatteryNow ! Big Digital Clock

[App page](https://appshunter.io/ios/app/batterynow-big-digital-clock/id622404130)

Monitor your device's battery life with real-time and trend graphs. Features a large, customizable digital clock with color options and dark mode support. Track battery percentage changes over time.

**Highlights:** Real-time battery monitoring, Battery trend logging, Large digital clock display, Customizable clock colors, Dark mode support, Battery percentage graphs

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

**In-app purchases:** none


### Sumi

[App page](https://appshunter.io/ios/app/sumi-notepad-calculator/id6816366548)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7‑Day Pro Trial | Free | one-time |
| Sumi Pro | $7.99 | one-time |


## Frequently asked questions

### Is BatteryNow ! Big Digital Clock free?

BatteryNow ! Big Digital Clock is free to download, with no in-app purchases.

### Is Sumi free?

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

### Do BatteryNow ! Big Digital Clock or Sumi have ads?

BatteryNow ! Big Digital Clock shows ads; Sumi does not.

### Which is updated more often, BatteryNow ! Big Digital Clock or Sumi?

BatteryNow ! Big Digital Clock ships an update every 9 months, and Sumi every 3 days. Most recently, BatteryNow ! Big Digital Clock was updated on November 1, 2026 and Sumi on November 12, 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.*