# Ampere vs Synapse

The clearest difference is in-app purchases: Synapse at none against Ampere's 1. Synapse also leads on ads (none vs shown). Ampere's advantage is device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Ampere sells 1 one-off in-app purchase. Synapse asks for nothing beyond the download.

Ampere ships an update every 3 months, Synapse every 2 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Ampere | Synapse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (15 ratings)](https://appshunter.io/ios/app/ampere-battery-charge-test/id1317191964/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 20.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 20 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CrioSoft LLC](https://appshunter.io/developer/1245475415) | [MikroStarTech](https://appshunter.io/developer/1451461286) |

## What reviewers say

### Ampere

[App page](https://appshunter.io/ios/app/ampere-battery-charge-test/id1317191964)

Measure your device's charging speed with different chargers, cables, and wireless sources. Track app battery usage, estimate remaining time for activities, and compare charging accessories to find the best ones.

**Highlights:** Measure charging speed, Compare chargers and cables, Estimate remaining usage time, Track app battery usage, Create custom reference tables

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disable Ads | $0.99 | one-time |

**What reviewers like**

- 🚀 Accurate measurements
- 👍 Simple and easy to use
- 🔋 Useful for testing chargers and cables

**What reviewers complain about**

- 🐛 Inconsistent results
- ⏱️ Slow testing process
- 💤 Doesn't work on latest iOS versions
- 📺 Intrusive ads
- 🤔 Questionable accuracy

**Reported bugs**

- Crashes on launch
- Fails to complete testing
- Incorrect wattage readings

**Requested features**

- Historical data logging
- Real-time monitoring
- Wireless charging support


### Synapse

[App page](https://appshunter.io/ios/app/synapse/id6756261199)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ampere free?

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

### Is Synapse free?

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

### Do Ampere or Synapse have ads?

Ampere shows ads; Synapse does not.

### Which is updated more often, Ampere or Synapse?

Ampere ships an update every 3 months, and Synapse every 2 months. Most recently, Ampere was updated on November 6, 2026 and Synapse 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.*