# Best Interval Timer vs E1RM Calculator

The clearest difference is in-app purchases: Best Interval Timer at none against E1RM Calculator's 1. E1RM Calculator's advantage is ads (none vs shown) and update cadence (every 8 days vs every 12 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. E1RM Calculator sells 1 one-off in-app purchase. Best Interval Timer asks for nothing beyond the download.

Best Interval Timer ships an update every 12 months, E1RM Calculator every 8 days. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Best Interval Timer | E1RM Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (81 ratings)](https://appshunter.io/ios/app/best-interval-timer/id547542742/reviews)** | — |
| Number of ratings | **81** | — |
| Positive reviews | 89.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 8 days** |
| Monetization | Ad-supported | — |
| Size | 19 MB | 0 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [倩 赵](https://appshunter.io/developer/376557917) | [Paul Walsh](https://appshunter.io/developer/1879357731) |

## What reviewers say

### Best Interval Timer

[App page](https://appshunter.io/ios/app/best-interval-timer/id547542742)

This app acts as your personal coach, guiding you through workouts with customizable routines. Focus on your exercise while it manages timing for warm-up, high/low intensity intervals, cool-downs, and rest periods.

**Highlights:** Customizable workout routines, Warm-up, intensity, cool-down, rest periods, Background and multitasking support, Adjustable interval sounds and vibrations, Workout practice tracking, Landscape and portrait orientation

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 👍 Simple and functional
- 👍 Free
- 👍 Customizable intervals
- 👍 Works in background

**What reviewers complain about**

- 🐛 Too many ads
- 🐛 Limited programmable routines (free version)
- 🐛 Ads block screen in landscape
- 🐛 Small numbers hard to read
- 🐛 Side view unusable

**Reported bugs**

- App stops working after rating notification
- Buttons don't work after rating notification
- Crashes when saving timers
- Crashes when editing exercises
- Freezes and stops working

**Requested features**

- Ability to save multiple intervals/routines
- Voice cues for start/stop
- Apple Watch compatibility
- Larger buttons and text
- Option to save different schedules (e.g., Tabata)


### E1RM Calculator

[App page](https://appshunter.io/ios/app/e1rm-calculator-rpe-based/id6759536865)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $1.99 | one-time |


## Frequently asked questions

### Is Best Interval Timer free?

Best Interval Timer is free to download, with no in-app purchases.

### Is E1RM Calculator free?

E1RM Calculator is free to download, with in-app purchases available.

### Do Best Interval Timer or E1RM Calculator have ads?

Best Interval Timer shows ads; E1RM Calculator does not.

### Which is updated more often, Best Interval Timer or E1RM Calculator?

Best Interval Timer ships an update every 12 months, and E1RM Calculator every 8 days. Most recently, Best Interval Timer was updated on October 11, 2026 and E1RM Calculator on October 12, 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.*