# One Rep Max vs NINE

The clearest difference is in-app purchases: NINE at none against One Rep Max's 3. NINE also leads on iOS requirement (11.0 vs 15.0). One Rep Max's advantage is update cadence (every 4 days vs every 22 months) and device support. On price there is nothing between them.

Both are free to download. One Rep Max sells 3 in-app purchases, starting at $2.99 per month. NINE asks for nothing beyond the download.

One Rep Max ships an update every 4 days, NINE every 22 months. The most recent releases landed on September 14, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | One Rep Max | NINE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (178 ratings)](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710/reviews)** | — |
| Number of ratings | **178** | — |
| Positive reviews | 58.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | **Every 4 days** | Every 22 months |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 56 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Charles Vanderhoff](https://appshunter.io/developer/950621709) | [SENKRON BILGISAYAR OTOM LTD.](https://appshunter.io/developer/498226578) |

## What reviewers say

### One Rep Max

[App page](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710)

Safely estimate your maximum lift potential for various strength exercises using scientific formulas. Track your progress visually, set goals, and fine-tune estimates with perceived exertion. Ideal for powerlifters, CrossFit athletes, and strength enthusiasts.

**Highlights:** Precise 1RM calculations with 7 scientific formulas, RPE integration for fine-tuned estimates, Custom exercise tracking for any lift, Visual progress graphs, Percentage charts for training, Goal setting and progress monitoring

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1RM Pro Monthly | $2.99 | per month |
| 1RM Pro Annual | $19.99 | per year |
| 1RM Pro Lifetime | $49.99 | one-time |

**What reviewers like**

- 👍 Easy to use interface
- 📊 Tracks progress with charts
- ➕ Plate calculator bonus feature
- 📈 Supports multiple 1RM formulas
- 💪 Helpful for tracking RMs

**What reviewers complain about**

- 💰 Subscription required for features
- 💸 Features moved behind paywall
- 😩 Useless without subscription
- 🚫 Basic features now paid
- 💸 High subscription cost

**Reported bugs**

- Features behind paywall
- Forced ads
- Deleted lifting history
- Lost all logs with update
- Weight limit restriction

**Requested features**

- Allow editing of logs (date/time)
- Manual entry for weight preferred over slider
- Include different 1RM formulas (Epley, Brzycki)
- Ability to create custom graphs
- Fix weight limit restriction


### NINE

[App page](https://appshunter.io/ios/app/nine/id6526477241)

**In-app purchases:** none


## Frequently asked questions

### Is One Rep Max free?

One Rep Max is free to download, with in-app purchases available.

### Is NINE free?

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

### Which is updated more often, One Rep Max or NINE?

One Rep Max ships an update every 4 days, and NINE every 22 months. Most recently, One Rep Max was updated on September 14, 2026 and NINE on May 18, 2026.

---

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