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Diet Bond

The two-person diet challenge

Your partner becomes your personal trainer.

Diet Bond turns losing weight into a pact between two people. Agree on a goal, log meals, exercise and weigh-ins, and reward each other every week you stay on track.

Coming soon toApp StoreComing soon toGoogle Play
Launching soon on iPhone and AndroidSee how it works
Week 3 · Weekly rewardAchieved

How Diet Bond works

One plan. Two roles.

Most diet apps are built for one person, alone with their willpower. Diet Bond is built for two: someone who wants to lose weight, and someone who's in their corner.

The Dieter

“The person who wishes to lose weight.”

  • Logs meals, exercise and weigh-ins, with photos
  • Rates how they behaved, from Very Good to Bad
  • Sends a message to the PT with every log
  • Rewards the PT each week the target is met

The PT

“The person who will help, support and motivate the Dieter.”

  • Sees every log as it lands in your shared chat
  • Replies, encourages and checks in when it counts
  • Follows weight, photos and behaviour week by week
  • Rewards the Dieter weekly and at the finish line

Either of you can start. Pick your role, then invite your partner by phone number.

The agreement

Put it in writing. Both of you.

Every Diet Bond challenge starts with an agreement your partner accepts. It turns a vague “I should lose weight” into a shared plan with dates, numbers and something to look forward to.

  1. Choose your rolesDecide who's the Dieter and who's the PT, then invite your partner from your contacts.
  2. Set the targetCurrent weight, target weight and the number of weeks to get there.
  3. Check it's realisticDiet Bond rates the goal's difficulty and suggests adjusting it if it's too aggressive.
  4. Plan the daySet times for up to six meals, from breakfast to a night snack.
  5. Agree the rewardsFour of them: weekly and final, from the PT to the Dieter and back.
  6. Both acceptYour partner reviews the agreement and accepts. The challenge begins.

Diet Bond Agreement

Sara & Tom Agreement

Accepted
Dieter
Sara — wishes to lose weight
PT
Tom — helps, supports, motivates
Current → target weight
82.0 kg → 72.0 kg
Time to achieve
16 weeks
Difficulty
Requires commitment

Meal schedule

  • Breakfast08:30
  • Morning Snack11:00
  • Lunch13:30
  • Afternoon Snack16:30
  • Dinner19:30
  • Night Snack21:30

Rewards

  • PT → Dieter, weekly: breakfast in bed
  • Dieter → PT, weekly: picks the Friday movie
  • Final rewards: a weekend away, together

Sara

Signed · Dieter

Tom

Signed · PT
Example Diet Bond agreement between a Dieter and a PT: current and target weight, 16-week timeframe, difficulty level, a six-meal schedule, weekly and final rewards in both directions, and both partners' acceptance.

Every week

A simple loop that keeps both of you in it.

Accountability works best when someone is actually looking. Diet Bond makes that easy, without turning your partner into the diet police.

  1. Log it

    The Dieter logs meals, exercise and weigh-ins with a photo, a behaviour rating and a note for the PT.

  2. Your PT sees it

    Every log lands in your private chat, so your PT can react, encourage and reply right away.

  3. Weekly check-in

    Each week has its own target weight on the way to the final goal. Your last weigh-in decides the week.

  4. Reward each other

    Hit the weekly target and the rewards you agreed on are earned, in both directions.

Progress

More than a number on a scale.

Weight goes up and down. Diet Bond's Progress tab shows the whole picture, so you can both see what's working and talk about what isn't.

Weight
A chart of every weigh-in against your goal, over all time or the last week.
Photos
Your starting photo and progress photos side by side, before and after.
Behavior
A face for every meal and workout, so you can spot the tricky days of the week.
Rewards
Each week's target and result: a gold trophy when achieved, silver when not.

Rewards

Rewards go both ways.

The Dieter does the hard work. The PT puts in the effort to support it. Every Diet Bond agreement rewards both, every week and at the finish.

How rewards work

  • PTrewardsDieter· Weekly

    Keeps the Dieter going

    A treat from the PT that's waiting at the end of every week the Dieter hits the weekly target.

  • DieterrewardsPT· Weekly

    Thanks the supporter

    When the weekly target is met, the Dieter rewards the PT for the help. Support should be rewarded too.

  • PTrewardsDieter· Final

    Celebrates the goal

    The big one, for reaching the final target weight. Something the Dieter will genuinely look forward to.

  • DieterrewardsPT· Final

    Shares the win

    The Dieter's final reward to the PT, because the result belongs to both of you.

What kind of rewards? That is up to both of you to decide. A gift, an activity, a love reward.

And the everyday details, handled.

  • Meal reminders

    Nudges at the meal times you scheduled together.

  • Private chat

    Messages and photos between the two of you, with every log in the thread.

  • Kg or lb

    Kg & Cm or Pounds & Feet, plus a 12- or 24-hour clock.

  • Share a win

    Share a log or invite friends to start their own challenge.

FAQ

Good questions.

More answers on the FAQ page.

Does my PT need to be a real personal trainer?

No. In Diet Bond, “PT” is a role, not a qualification. Your PT is your partner: the person who checks in on your logs, replies to your messages, cheers you on and keeps their side of the reward deal.

Who can be my PT?

Diet Bond is designed around couples, so your love partner is the natural choice. In the app you invite your PT by phone number, either typed in or picked from your contacts.

What can my PT see?

While your agreement is active, your PT can see your meal, exercise and weight logs and your progress. Your PT can view your logs but can't edit them. Until the agreement is accepted, your logs aren't shared.

How are the weekly targets calculated?

Diet Bond draws a straight line from your starting weight to your target weight across the weeks you agreed on. Each week has its own target on that line. If the last weight you log that week is at or below the target, the week is marked Achieved.

Does Diet Bond count calories or give me a meal plan?

No. Diet Bond doesn't prescribe diets, meal plans or calorie targets. It's an accountability tool: you agree on goals and meal times, log what you actually eat and do, and support each other along the way.

Start your Diet Bond challenge together.

Download the app, pick your roles, and send your partner the agreement. The first weekly target is only seven days away.

Coming soon toApp StoreComing soon toGoogle Play

Diet Bond is launching on iPhone and Android. Store links will appear here.