# Battery Calculator vs Big Letters

The clearest difference is update cadence: Big Letters at fortnightly against Battery Calculator's every 40 months. Big Letters also leads on price ($0.99 vs $2.99). Battery Calculator's advantage is iOS requirement (13.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Battery Calculator costs $2.99 and Big Letters $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Battery Calculator ships an update every 40 months, Big Letters fortnightly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Battery Calculator | Big Letters |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Pawel Pela](https://appshunter.io/developer/1853984980) |

## What reviewers say

### Battery Calculator

[App page](https://appshunter.io/ios/app/battery-calculator/id1229567971)

Calculate estimated battery run time based on capacity and device consumption. Determine battery capacity from stored energy and voltage, and calculate required battery ratings based on load and duration.

**Highlights:** Battery life calculator, Battery capacity calculator, Battery size calculator, Estimate run time, Calculate battery capacity in Wh, Calculate required battery rating in Ah

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

**In-app purchases:** none


### Big Letters

[App page](https://appshunter.io/ios/app/big-letters-text-display/id6756288435)

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

**In-app purchases:** none


## Frequently asked questions

### Is Battery Calculator free?

Battery Calculator costs $2.99, with no in-app purchases.

### Is Big Letters free?

Big Letters costs $0.99, with no in-app purchases.

### Do Battery Calculator or Big Letters have ads?

Neither Battery Calculator nor Big Letters shows ads.

### Which is updated more often, Battery Calculator or Big Letters?

Battery Calculator ships an update every 40 months, and Big Letters fortnightly. Most recently, Battery Calculator was updated on November 6, 2026 and Big Letters on November 5, 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.*