# Battery Grapher vs SharpKnife Pro

The clearest difference is update cadence: SharpKnife Pro at daily against Battery Grapher's every 2 months. SharpKnife Pro also leads on price ($0.99 vs $1.99). Battery Grapher's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.5). On ads and in-app purchases there is nothing between them.

Battery Grapher costs $1.99 and SharpKnife Pro $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Battery Grapher ships an update every 2 months, SharpKnife Pro daily. The most recent releases landed on October 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Battery Grapher | SharpKnife Pro |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | **[4.3 (153 ratings)](https://appshunter.io/ios/app/battery-grapher/id1498632956/reviews)** | — |
| Number of ratings | **153** | — |
| Positive reviews | 60.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 5 MB | 6 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Bird](https://appshunter.io/developer/1549690243) | [ANNULET CONSULTING, LLC](https://appshunter.io/developer/1757762049) |

## What reviewers say

### Battery Grapher

[App page](https://appshunter.io/ios/app/battery-grapher/id1498632956)

This app tracks your device's battery usage over time and uses your historical data to predict future battery levels. It's designed for low energy consumption and offers customizable notifications to help you manage charging times.

**Highlights:** Historical battery level graphing, Smart future battery predictions, Low energy consumption design, Customizable battery notifications, Supports all complications and widget sizes

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative battery prediction feature
- ⌚ Accurate Apple Watch complication display
- 📊 Detailed battery usage analytics and graphs
- 🎯 Learns usage patterns over time for better accuracy
- 🔋 Shows hours remaining instead of just percentage

**What reviewers complain about**

- 🐛 Complication fails to update frequently
- ❌ Widget missing or not appearing on installation
- 🔴 Inaccurate battery predictions, especially on newer devices
- ⏰ Updates only once per hour, causing stale data
- 📉 Accuracy takes weeks to improve on Apple Watch

**Reported bugs**

- Widget not displaying on initial installation
- Complication shows stale data and doesn't refresh automatically
- Battery percentage stuck at incorrect values (e.g., 73%, 68%)
- Accuracy status fluctuates rapidly between good and bad
- Missing data warnings despite app being in dock

**Requested features**

- Watch complication for Smart Stack (watchOS 10+)
- Support for Apple Watch Ultra with correct 36-hour battery display
- Low power mode detection and separate prediction profiles
- Force refresh button in app
- More frequent update intervals (user-configurable)


### SharpKnife Pro

[App page](https://appshunter.io/ios/app/sharpknife-pro/id6550906595)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Battery Grapher free?

Battery Grapher costs $1.99, with no in-app purchases.

### Is SharpKnife Pro free?

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

### Do Battery Grapher or SharpKnife Pro have ads?

Neither Battery Grapher nor SharpKnife Pro shows ads.

### Which is updated more often, Battery Grapher or SharpKnife Pro?

Battery Grapher ships an update every 2 months, and SharpKnife Pro daily. Most recently, Battery Grapher was updated on October 1, 2026 and SharpKnife Pro on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*