# Auto Stamp vs Energy Save

The clearest difference is iOS requirement: Energy Save at 15.1 against Auto Stamp's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 12, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Auto Stamp | Energy Save |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 19 MB | 30 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Apjam Ltd](https://appshunter.io/developer/603518757) | [ES Energy Save Holding AB (publ)](https://appshunter.io/developer/1704282398) |

## What reviewers say

### Auto Stamp

[App page](https://appshunter.io/ios/app/auto-stamp/id6470200439)

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

**In-app purchases:** none


### Energy Save

[App page](https://appshunter.io/ios/app/energy-save/id6639618381)

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

**In-app purchases:** none


## Frequently asked questions

### Is Auto Stamp free?

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

### Is Energy Save free?

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

### Do Auto Stamp or Energy Save have ads?

Neither Auto Stamp nor Energy Save shows ads.

### Which is updated more often, Auto Stamp or Energy Save?

Auto Stamp ships an update monthly, and Energy Save monthly. Most recently, Auto Stamp was updated on September 12, 2026 and Energy Save on September 17, 2026.

---

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