animated_text_lerp

Package Overview

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AnimatedTextLerp is a Flutter package that provides simple widgets to smoothly animate between numeric or string values. It enables fluid transitions for dynamic text, such as increasing or decreasing numbers, currency updates, or changing text content with visual continuity. Ideal for dashboards, counters, and real-time data displays, it leverages interpolation (lerp) for smooth visual effects without complex animations. The package supports all major platforms including Android, iOS, Web, macOS, Windows, and Linux.

Use cases

Real-time number counters
Currency value updates
Dynamic text transitions
Dashboard metrics
Loading progress indicators
Animated statistics

Key features

Smooth lerp-based animation
Supports both numbers and strings
Minimal setup required
Cross-platform compatibility
Customizable duration and curve
Built-in easing functions

Suitable for

Simple animated counters
Data visualization widgets
User interface enhancements
Educational apps
Financial dashboards

Considerations

Not ideal for complex animations
Limited customization beyond basic properties
Best suited for small text changes
May impact performance with high-frequency updates
Requires careful handling of string formatting

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Simple widgets to animate between number or string text. Useful for number increase/decrease animation, currency value animation or string content changing animation.

Features

Similar to a simple Text widget.
Animating between number (int or double) with AnimatedNumberText.
Animating between string, which will lerp each character respectively with AnimatedStringText.
TextStyle animation supported.
Think of Flutter's pre-built animated widget like AnimatedOpacity, AnimatedAlign, ..., but with text.

Getting started

First import it:

import 'package:animated_text_lerp/animated_text_lerp.dart';

Usage

AnimatedNumberText

The widget support lerping between number values. Just setState with the current value and the widget will start animating to it.

AnimatedNumberText(
  value, // int or double
  curve: Curves.easeIn,
  duration: const Duration(seconds: 1),
  style: const TextStyle(fontSize: 30),
  formatter: (value) {
    final formatted =
    intl.NumberFormat.currency(locale: "en").format(value);
    return formatted;
  },
)

AnimatedStringText

The widget support lerping between string values. Just setState with the current value and the widget will start animating to it. Each character will lerp to the new corresponding one respectively.

AnimatedStringText(
  value, // string
  curve: Curves.easeIn,
  duration: const Duration(seconds: 1),
  style: const TextStyle(fontSize: 30),
)

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