# By Then — Weight gain/loss companion

> Weight gain/loss companion (iPhone/iPad app by Michael Lysons.)

- Source: https://appshunter.io/ios/app/by-then/id6748918554 (this page in markdown: same URL + `.md`)
- Developer: [Michael Lysons](https://appshunter.io/developer/469522690)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.5 · 6 MB
- Languages: English
- Released: 2025-08-18
- Data updated: 2026-08-07
- User reviews in markdown: https://appshunter.io/ios/app/by-then/id6748918554/reviews.md

## What is By Then?

A weight gain/loss calculator for people who have weight goals they want to achieve.

If you need to gain weight or lose weight, By Then will tell you what you need to do to achieve that goal. Simply enter your current weight and target weight, and then either a weekly weight change you can commit to or a target date, and By Then will calculate the rest.

The widgets allow you to perform the calculations right on your Home Screen for added convenience.

A one-off purchase unlocks the weekly weight-change projections view and a number of themes to personalise the app.

Simple, focused, to the point; you'll know where you need to be, By Then.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all features | $5.00 | one-time |



## Version history (last 3 releases)

### 2026.3 — 2026-08-01

Minor bug fixes and updates.
Some stability improvements to tap areas.

### 2025.2 — 2025-09-11

Saved calculations: Save your calculations so you can have different calculations for various situations, and retrieve the relevant calculation when required.

### 2025.1 — 2025-08-18

No release notes.

## Apps similar to By Then

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Back Workout & Posture Fix](https://appshunter.io/ios/app/back-workout-and-posture-fix/id1534037130) | 4.3 (18) | Free | Health & Fitness |
| [Dig Deeper](https://appshunter.io/ios/app/dig-deeper/id6472387394) | 5.0 (3) | Free | Health & Fitness |
| [AI Calorie Tracker - helian](https://appshunter.io/ios/app/ai-calorie-tracker-helian/id6751594158) | 5.0 (1) | Free | Health & Fitness |
| [Hike Maker: Route Planner](https://appshunter.io/ios/app/hike-maker-route-planner/id6636466430) | 5.0 (2) | Free | Health & Fitness |
| [nutrivio: AI Food Meal Logger](https://appshunter.io/ios/app/nutrivio-ai-food-meal-logger/id6748462599) | — | Free | Health & Fitness |
| [WatchFit: Custom Watch Workout](https://appshunter.io/ios/app/watchfit-custom-watch-workout/id6464086175) | 4.9 (34) | Free | Health & Fitness |

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*