# one plus one automation vs ethos

The clearest difference is price: ethos at Free against one plus one automation's $0.99. one plus one automation's advantage is in-app purchases (none vs 30) and update cadence (every 2 weeks vs every 10 months). On ads and device support there is nothing between them.

ethos is free to download; one plus one automation costs $0.99 up front. ethos sells 30 one-off in-app purchases. one plus one automation asks for nothing beyond the download.

one plus one automation ships an update every 2 weeks, ethos every 10 months. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | one plus one automation | ethos |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 10 months |
| Monetization | Paid | — |
| Size | 9 MB | 31 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Christian Urff](https://appshunter.io/developer/415894463) | [Schwengeler Verlag AG](https://appshunter.io/developer/1502116712) |

## What reviewers say

### one plus one automation

[App page](https://appshunter.io/ios/app/one-plus-one-automation/id1488214104)

This app helps children automate addition and subtraction skills. It uses intelligent training methods based on memory principles to reinforce learned tasks and improve recall speed. Designed for children who already understand basic math concepts, it focuses on memorization for more complex calculations.

**Highlights:** Addition and subtraction up to 20, Intelligent training based on memory, Individual learning progress tracking, Written and spoken task presentation, Distraction-free learning environment, Timed challenges for recall speed

**Features:** macOS Compatibility

**In-app purchases:** none


### ethos

[App page](https://appshunter.io/ios/app/ethos/id1502116713)

**Features:** macOS Compatibility

**In-app purchases (30)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ethos 03/2023 | $4.99 | one-time |
| ethos 05/2023 | $4.99 | one-time |
| ethos (99568) | $4.99 | one-time |
| ethos (31357) | $4.99 | one-time |
| ethos (2670) | $4.99 | one-time |
| ethos (88249) | $4.99 | one-time |
| ethos (99052) | $4.99 | one-time |
| ethos 04/2023 | $4.99 | one-time |
| ethos (58966) | $4.99 | one-time |
| ethos (11835) | $4.99 | one-time |
| ethos (19828) | $4.99 | one-time |
| ethos (29259) | $4.99 | one-time |
| ethos (91226) | $4.99 | one-time |
| ethos (11748) | $4.99 | one-time |
| ethos (49541) | $4.99 | one-time |
| ethos (48380) | $4.99 | one-time |
| ethos (20608) | $4.99 | one-time |
| ethos (53919) | $4.99 | one-time |
| ethos (77271) | $4.99 | one-time |
| ethos (19869) | $4.99 | one-time |
| ethos (2610) | $9.99 | one-time |
| ethos (84265) | $9.99 | one-time |
| ethos (9783) | $9.99 | one-time |
| ethos (29467) | $9.99 | one-time |
| ethos (87198) | $9.99 | one-time |
| ethos (97255) | $9.99 | one-time |
| ethos (87199) | $9.99 | one-time |
| ethos (68563) | $9.99 | one-time |
| ethos (81749) | $9.99 | one-time |
| ethos (18820) | $9.99 | one-time |


## Frequently asked questions

### Is one plus one automation free?

one plus one automation costs $0.99, with no in-app purchases.

### Is ethos free?

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

### Do one plus one automation or ethos have ads?

Neither one plus one automation nor ethos shows ads.

### Which is updated more often, one plus one automation or ethos?

one plus one automation ships an update every 2 weeks, and ethos every 10 months. Most recently, one plus one automation was updated on September 28, 2026 and ethos on October 2, 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.*